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Sarah McMath

MOSL Careers

To find out more about our current vacancies, internship opportunities and some of the benefits we offer, visit our dedicated Careers page.

Market Codes

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The latest version of the market codes, the change process and consultations on changes.

Panel & Committees

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What the Panel does and meeting details, member biogs and panel committees

CMOS

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Everything to do with the core IT system that underpins MOSL’s role within the new water market

Market Performance

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Key charts and information outlining market performance including switching and settlement

FORTHCOMING EVENTS

25Feb

Panel Meeting 40

25Feb

Waterwise & WRE Demand Management Workshop

26Feb

MPC Meeting 35

28Feb

Tariff final update date (MPS2)

28Feb

Tariff final update date (Production)

04Mar

Tariff authorisation date

05Mar

Feb 2020 Settlement R1 Invoice Period

05Mar

Dec 2019 Settlement R2 Invoice Period

05Mar

Jun 2019 Settlement R3 Invoice Period

05Mar

Oct 2018 Settlement RF Invoice Period

09Mar

OPS submission deadline

10Mar

Apr 2020 Settlement P1 Invoice Period

11Mar

Deadline for Opting into Gap Site

11Mar

MPC Agenda published

12Mar

Invoices for MPS, OPS and MO sent to trading parties

13Mar

MPS and OPS reports published and OPS data refreshed

18Mar

Trading Disputes Committee

18Mar

MPC Papers published (non-confidential)

19Mar

User Forum

24Mar

MPC papers published (non-confidential)

24Mar

Credit Committee Meeting 14

25Mar

List of Opted in Retailers by Area for Gap sites published

25Mar

TEIC Meeting 23

31Mar

Panel Meeting 41

01Apr

MPC Meeting 36

06Apr

Mar 2020 Settlement R1 Invoice Period

06Apr

Jan 2020 Settlement R2 Invoice Period

06Apr

Jul 2019 Settlement R3 Invoice Period

06Apr

Nov 2018 Settlement RF Invoice Period

07Apr

May 2020 Settlement P1 Invoice Period

08Apr

OPS submission deadline

15Apr

Trading Disputes Committee

15Apr

MPS and OPS charts updated

15Apr

MPS Reports, Market Charts and Market Focus Published

15Apr

MPC Agenda published

16Apr

MPS and OPS reports published and OPS data refreshed

16Apr

User Forum

17Apr

CMOS Release 8.0 deployed in MPS2 – 10am to 8am (next day)

20Apr

CMOS Planned Maintenance MPS/MPS2 – 10am to 4pm

21Apr

CMOS Planned Maintenance MPS/MPS2 – 10am to 4pm

22Apr

CMOS Planned Maintenance MPS/MPS2 if required – 10am to 4pm

22Apr

MPC Papers published (non-confidential)

25Apr

CMOS Planned Maintenance PROD – 11pm to 6am (next day)

27Apr

Panel Meeting 41a

28Apr

Panel Meeting 42

29Apr

MPC Meeting 37

04May

CMOS Release 8.0 Patch Drop in MPS2 – 10am to 5pm

07May

Apr 2020 Settlement R1 Invoice Period

07May

Feb 2020 Settlement R2 Invoice Period

07May

Aug 2019 Settlement R3 Invoice Period

07May

Dec 2018 Settlement RF Invoice Period

07May

Jun 2020 Settlement P1 Invoice Period

11May

OPS submission deadline

12May

MPC agenda published

14May

MPS and OPS charts updated

15May

MPS and OPS reports published and OPS data refreshed

15May

CMOS Release 8.0 deployed in PROD – 6pm-2pm (next day)

19May

MPC papers published (non-confidential)

19May

CMOS Release 8.0 deployed in MPS – 10am to 5pm

20May

Trading Disputes Committee

26May

Panel Meeting 43

27May

MPC Meeting 38

04Jun

May 2020 Settlement R1 Invoice Period

04Jun

Mar 2020 Settlement R2 Invoice Period

04Jun

Sep 2019 Settlement R3 Invoice Period

04Jun

Jan 2019 Settlement RF Invoice Period

07Jun

Jun 2020 Settlement R1 Invoice Period

08Jun

Jul 2020 Settlement R1 Invoice Period

08Jun

OPS submission deadline

09Jun

Jul 2020 Settlement P1 Invoice Period

10Jun

MPC agenda published

11Jun

MPS and OPS charts updated

12Jun

MPS and OPS reports published and OPS data refreshed

17Jun

MPC papers published (non-confidential)

18Jun

User Forum

24Jun

Trading Disputes Committee

24Jun

MPC Meeting 39

30Jun

Panel Meeting 44

06Jul

Apr 2020 Settlement R2 Invoice Period

06Jul

Oct 2019 Settlement R3 Invoice Period

06Jul

Feb 2019 Settlement RF Invoice Period

08Jul

OPS submission deadline

10Jul

Aug 2020 Settlement P1 Invoice Period

13Jul

MPS and OPS charts updated

14Jul

MPS and OPS reports published and OPS data refreshed

15Jul

MPC agenda published

15Jul

Trading Disputes Committee

20Jul

CMOS Planned Maintenance MPS/MPS2 – 10am to 4pm

21Jul

CMOS Planned Maintenance MPS/MPS2 – 10am to 4pm

21Jul

Panel Meeting 45

22Jul

MPC papers published (non-confidential)

22Jul

CMOS Planned Maintenance MPS/MPS2 if required – 10am to 4pm

29Jul

MPC Meeting 40

06Aug

May 2020 Settlement R2 Invoice Period

06Aug

Nov 2019 Settlement R3 Invoice Period

06Aug

Mar 2019 Settlement RF Invoice Period

07Aug

Sep 2020 Settlement P1 Invoice Period

10Aug

OPS submission deadline

12Aug

MPC agenda published

13Aug

MPS and OPS charts updated

14Aug

MPS and OPS reports published and OPS data refreshed

14Aug

CMOS Release 8.5 Patch Drop in MPS2 – 10am to 5pm

15Aug

CMOS Planned Maintenance PROD – 11pm to 6am (next day)

19Aug

Trading Disputes Committee

19Aug

MPC papers published (non-confidential)

25Aug

Panel Meeting 46

26Aug

MPC Meeting 41

28Aug

CMOS Release 8.5 deployed in PROD – 6pm-2pm (next day)

02Sep

CMOS Release 8.5 deployed in MPS – 10am to 5pm

04Sep

Aug 2020 Settlement R1 Invoice Period

04Sep

Jun 2020 Settlement R2 Invoice Period

04Sep

Dec 2019 Settlement R3 Invoice Period

04Sep

Apr 2019 Settlement RF Invoice Period

08Sep

OPS submission deadline

09Sep

Oct 2020 Settlement P1 Invoice Period

11Sep

MPS and OPS charts updated

14Sep

MPS and OPS reports published and OPS data refreshed

16Sep

MPC agenda published

17Sep

User Forum

23Sep

Trading Disputes Committee

23Sep

MPC papers published (non-confidential)

29Sep

Panel Meeting 47

30Sep

MPC Meeting 42

02Oct

CMOS Release 9.0 deployed in MPS2 – 10am to 8am (next day)

06Oct

Sep 2020 Settlement R1 Invoice Period

06Oct

Jul 2020 Settlement R2 Invoice Period

06Oct

Jan 2020 Settlement R3 Invoice Period

06Oct

May 2019 Settlement RF Invoice Period

08Oct

OPS submission deadline

09Oct

Nov 2020 Settlement P1 Invoice Period

13Oct

MPS and OPS charts updated

14Oct

MPC agenda published

14Oct

Trading Disputes Committee

14Oct

MPS and OPS reports published and OPS data refreshed

15Oct

User Forum

16Oct

CMOS Release 9.0 Patch Drop in MPS2 – 10am to 5pm

19Oct

CMOS Planned Maintenance MPS/MPS2 – 10am to 4pm

20Oct

CMOS Planned Maintenance MPS/MPS2 – 10am to 4pm

21Oct

MPC papers published (non-confidential)

21Oct

CMOS Planned Maintenance MPS/MPS2 if required – 10am to 4pm

27Oct

Panel Meeting 48

28Oct

MPC Meeting 43

05Nov

Oct 2020 Settlement R1 Invoice Period

05Nov

Aug 2020 Settlement R2 Invoice Period

05Nov

Feb 2020 Settlement R3 Invoice Period

05Nov

Jun 2019 Settlement RF Invoice Period

06Nov

CMOS Release 9.0 deployed in PROD – 6pm-2pm (next day)

09Nov

Dec 2020 Settlement P1 Invoice Period

09Nov

OPS submission deadline

10Nov

CMOS Release 9.0 deployed in MPS – 10am to 5pm

11Nov

MPC agenda published

12Nov

MPS and OPS charts updated

13Nov

MPS and OPS reports published and OPS data refreshed

14Nov

CMOS Planned Maintenance PROD – 11pm to 6am (next day)

18Nov

MPC papers published (non-confidential)

18Nov

Trading Disputes Committee

19Nov

User Forum

23Nov

Panel Meeting 48a

24Nov

Panel Meeting 49

25Nov

MPC Meeting 44

04Dec

Nov 2020 Settlement R1 Invoice Period

04Dec

Sep 2020 Settlement R2 Invoice Period

04Dec

Mar 2020 Settlement R3 Invoice Period

04Dec

Jul 2019 Settlement RF Invoice Period

08Dec

Jan 2021 Settlement P1 Invoice Period

08Dec

OPS submission deadline

11Dec

MPS and OPS charts updated

14Dec

MPS and OPS reports published and OPS data refreshed

15Dec

Panel Meeting 50

18Dec

Trading Disputes Committee

07Jan

Dec 2020 Settlement R1 Invoice Period

07Jan

Oct 2020 Settlement R2 Invoice Period

07Jan

Apr 2020 Settlement R3 Invoice Period

07Jan

Aug 2019 Settlement RF Invoice Period

08Jan

Feb 2021 Settlement P1 Invoice Period

11Jan

OPS submission deadline

13Jan

MPC agenda published

14Jan

MPS and OPS charts updated

15Jan

MPS and OPS reports published and OPS data refreshed

18Jan

CMOS Planned Maintenance MPS/MPS2 – 10am to 4pm

19Jan

CMOS Planned Maintenance MPS/MPS2 – 10am to 4pm”

20Jan

MPC papers published (non-confidential)

20Jan

CMOS Planned Maintenance MPS/MPS2 if required – 10am to 4pm

21Jan

User Forum

27Jan

MPC Meeting 46

04Feb

Jan 2021 Settlement R1 Invoice Period

04Feb

Nov 2020 Settlement R2 Invoice Period

04Feb

May 2020 Settlement R3 Invoice Period

04Feb

Sep 2019 Settlement RF Invoice Period

05Feb

Mar 2021 Settlement P1 Invoice Period

06Feb

CMOS Planned Maintenance PROD – 11pm to 6am (next day)

08Feb

OPS submissiondeadline

10Feb

MPC agenda published

11Feb

MPS and OPS charts updated

12Feb

MPS and OPS reports published and OPS data refreshed

17Feb

MPC papers published (non-confidential)

18Feb

User Forum

24Feb

MPC Meeting 47

04Mar

Feb 2021 Settlement R1 Invoice Period

04Mar

Dec 2020 Settlement R2 Invoice Period

04Mar

Jun 2020 Settlement R3 Invoice Period

04Mar

Oct 2019 Settlement RF Invoice Period

08Mar

OPS submission deadline

10Mar

Apr 2021 Settlement P1 Invoice Period

11Mar

MPS and OPS charts updated

12Mar

MPS and OPS reports published and OPS data refreshed

17Mar

MPC agenda published

18Mar

User Forum

24Mar

MPC papers published (non-confidential)

31Mar

MPC Meeting 48

16Apr

CMOS Release 10.0 deployed in MPS2 – 10am to 8am (next day)

30Apr

CMOS Release 10.0 Patch Drop in MPS2 – 10am to 5pm

14May

CMOS Release 10.0 deployed in PROD – 6pm-2pm (next day)

18May

CMOS Release 10.0 deployed in MPS – 10am to 5pm

30Jul

CMOS Release 10.5 deployed in MPS2 – 10am to 8am (next day)

13Aug

CMOS Release 10.5 Patch Drop in MPS2 – 10am to 5pm

27Aug

CMOS Release 10.5 deployed in PROD – 6pm-2pm (next day)

31Aug

CMOS Release 10.5 deployed in MPS – 10am to 5pm

01Oct

CMOS Release 11.0 deployed in MPS2 – 10am to 8am (next day)

15Oct

CMOS Release 11.0 Patch Drop in MPS2 – 10am to 5pm

05Nov

CMOS Release 11.0 deployed in PROD – 6pm-2pm (next day)

09Nov

CMOS Release 11.0 deployed in MPS – 10am to 5pm

MOSL@mosl_

We have now published the job descriptions for our #bilaterals project #secondment opportunities. Do you have exper… https://t.co/JSvqtfzyem

10:34 - 21 Feb 2020

RT @wessexwater: We can’t believe #PancakeDay has ‘creped’ up on us 🥞 If you’re creating your own pancake art this weekend, remember to ma…

10:33 - 21 Feb 2020

Applications for our #internship programme close this Sunday! Apply for a position with our Digital and Market Perf… https://t.co/Iqf3xEs5N9

12:14 - 20 Feb 2020

February's Market Focus features a round up of @MOSL_ activities including our bilateral transactions project dat… https://t.co/C6oz5mchuP

12:47 - 19 Feb 2020

RT @NorthumbrianH2O: Here's some #TuesdayThoughts for you... Using a dishwasher actually uses LESS water than washing dishes by hand, eve…

09:26 - 19 Feb 2020

There will be no #UserForum this month. But, in case you missed January's meeting, be sure to check out the video p… https://t.co/KJ2EHPF03G

11:31 - 18 Feb 2020

RT @Ofwat: Ofwat has announced that it has revoked the Water Supply and Sewerage Licences (WSSL) of Tor Water Limited as of 6pm Wednesday 1…

10:27 - 18 Feb 2020

Today we have published the findings from our annual Trading Party #survey. Read the full report here:… https://t.co/RAIDzLwTVQ

10:30 - 17 Feb 2020

Today we introduce @MOSL_'s first in a new series of #thoughtleadership blogs. To set us off to a good start, our D… https://t.co/20rPxPwBhD

14:15 - 14 Feb 2020

We are feeling inspired at today's @RewardGateway #enexsummit, where we join over 600 HR professionals sharing how… https://t.co/j2pynzqP06

12:30 - 13 Feb 2020

Our #intern programme 2020 includes an industry #placement as part of our L&D week. Competitive salary and flexible… https://t.co/3wm303GOPM

10:08 - 12 Feb 2020

Tonight @MOSL_'s CEO @SarahMcMath3 will be attending the @British_Water 2020 Winter Reception. We look forward to m… https://t.co/jZ5LHs1pgC

14:57 - 11 Feb 2020

Welcome. What area do you need help with?

Market Codes

Panel & Committees

CMOS

Market Performance

FORTHCOMING EVENTS

Panel Meeting 40

Waterwise & WRE Demand Management Workshop

MPC Meeting 35

Tariff final update date (MPS2)

Tariff final update date (Production)

Tariff authorisation date

Feb 2020 Settlement R1 Invoice Period

Dec 2019 Settlement R2 Invoice Period

Jun 2019 Settlement R3 Invoice Period

Oct 2018 Settlement RF Invoice Period

OPS submission deadline

Apr 2020 Settlement P1 Invoice Period

Deadline for Opting into Gap Site

MPC Agenda published

Invoices for MPS, OPS and MO sent to trading parties

MPS and OPS reports published and OPS data refreshed

Trading Disputes Committee

MPC Papers published (non-confidential)

User Forum

MPC papers published (non-confidential)

Credit Committee Meeting 14

List of Opted in Retailers by Area for Gap sites published

TEIC Meeting 23

Panel Meeting 41

MPC Meeting 36

Mar 2020 Settlement R1 Invoice Period

Jan 2020 Settlement R2 Invoice Period

Jul 2019 Settlement R3 Invoice Period

Nov 2018 Settlement RF Invoice Period

May 2020 Settlement P1 Invoice Period

OPS submission deadline

Trading Disputes Committee

MPS and OPS charts updated

MPS Reports, Market Charts and Market Focus Published

MPC Agenda published

MPS and OPS reports published and OPS data refreshed

User Forum

CMOS Release 8.0 deployed in MPS2 – 10am to 8am (next day)

CMOS Planned Maintenance MPS/MPS2 – 10am to 4pm

CMOS Planned Maintenance MPS/MPS2 – 10am to 4pm

CMOS Planned Maintenance MPS/MPS2 if required – 10am to 4pm

MPC Papers published (non-confidential)

CMOS Planned Maintenance PROD – 11pm to 6am (next day)

Panel Meeting 41a

Panel Meeting 42

MPC Meeting 37

CMOS Release 8.0 Patch Drop in MPS2 – 10am to 5pm

Apr 2020 Settlement R1 Invoice Period

Feb 2020 Settlement R2 Invoice Period

Aug 2019 Settlement R3 Invoice Period

Dec 2018 Settlement RF Invoice Period

Jun 2020 Settlement P1 Invoice Period

OPS submission deadline

MPC agenda published

MPS and OPS charts updated

MPS and OPS reports published and OPS data refreshed

CMOS Release 8.0 deployed in PROD – 6pm-2pm (next day)

MPC papers published (non-confidential)

CMOS Release 8.0 deployed in MPS – 10am to 5pm

Trading Disputes Committee

Panel Meeting 43

MPC Meeting 38

May 2020 Settlement R1 Invoice Period

Mar 2020 Settlement R2 Invoice Period

Sep 2019 Settlement R3 Invoice Period

Jan 2019 Settlement RF Invoice Period

Jun 2020 Settlement R1 Invoice Period

Jul 2020 Settlement R1 Invoice Period

OPS submission deadline

Jul 2020 Settlement P1 Invoice Period

MPC agenda published

MPS and OPS charts updated

MPS and OPS reports published and OPS data refreshed

MPC papers published (non-confidential)