This section explains the various groups through which MOSL engages with its members.

MOSL's 'first line' of engagement with its members regarding the Bilateral Transactions Programme will be with existing advisory groups such as the Wholesale Retailer Group (WRG) and Operational Advisory Group (OAG) and new groups such as the Technology Advisory Group (TAG).

We expect that we will initially share and iterate high-level designs and principles with these relatively small working groups, moving into more detailed discussion as we begin to build elements of the hub. Working with a sub-set of market participants initially to get their input and feedback on ideas and proposed solutions will allow more detailed discussions and more rapid turnaround than would be possible with some of our larger groups (e.g. ORWG).

The output of these groups with then be shared across all market participants for their input, either on a ‘for information only’ basis or a more formal consultation where the bilateral hub may fundamentally change a market process.

MOSL is keen to ensure that the advisory groups are as representative of the market as possible. We recognise that this is not always the case for all groups. This has been principally due to resource limitations, typically among some of the smaller trading parties in the market, although the increased use of videoconferencing during the Covid-19 pandemic is helping in this respect.

We would like to remind participants that would like to engage more closely with MOSL but are unable to do so that the groups are purely advisory bodies. In the event of an imbalance in industry representation that is considered to be an issue, MOSL will encourage other members’ participation on the group and/or get input from any under-represented sector(s) on an informal or ad-hoc basis, prior to sharing proposals more widely.

For more information, or to discuss joining one of the groups below, please email the person listed. To receive notification of meetings and meeting outputs, even if you do not attend a particular meeting, please subscribe to the appropriate mailing group(s) and/or update your preferences.

MOSL forums

Meeting Frequency Format Members Purpose Terms of Ref Chair Contact
Operational Advisory Group (OAG) Twice monthly
(1st & 3rd Thursdays)
Teams 8

Subject matter experts who engage with MOSL to test assumptions around operational-related changes to the bilateral programme. Advisory input to the Codes Advisory Group (CAG).

Link MOSL Evan Joanette

Wholesaler Retailer Group (WRG)
Sub-groups (each with own Chair) include: Bilaterals; Governance; Eligibility; Policies; Vacancies; Unplanned Activities; Planned Activities; Retail Measure of Experience (R-Mex); Meter Reading Stds; Meter Location Stds; Water Efficiency & Complaints.

Twice yearly

Sub-groups usually meet monthly
Teams c70

The WRG meets to tackle the big market operational issues and make changes/share good practice to improve overall customer service in the market.

Link Members Evan Joanette
Technical Advisory Group (TAG) Every 2 months Teams 15 New group. The TAG helps advise and inform MOSL’s digital and data strategy and to understand the practical ‘real world’ implications of its proposals on market participants’ technology roadmaps. The first priority for the TAG will be to feed back on MOSL’s proposals for a technical solution to the Bilaterals Programme.  Link MOSL John Davies
Code Advisory Group (CAG) Convenes when code changes are proposed Teams 6 The Code Advisory Group will review any code changes relating to the Bilaterals Programme. Link MOSL Evan Joanette
User Forum

Bi-monthly (click here for details)

Alternates with ORWG.

 Teams Varies (open to all)

The User Forum is open to all Trading Parties and meets to identify, resolve and document market risk, challenge or required action. It provides a collaborative environment in which the risks, challenges and strategic operations for Trading Parties can be identified and constructively progressed. As such, the User Forum will include regular updates regarding the bilateral transactions programme.

Link  MOSL Markus Lloyd
Operations & Release Working Group (ORWG)


Alternates with User Forum. 

Teams  c40

Main working-level technical meeting comprising members of the Programme Group to engage with market participants to review process or data quality issues that affect market operation. Provides detailed technical updates to IT Subject Matter Experts to ensure Trading Party IT Technical delivery plans are aligned with MOSL Release Plans. No decision making authority unless specifically asked to do so.

Link  MOSL Ricardo Wissmann-Alves

Log In

Please login to view secure online content. If you’re not a member you can register here. Note registration is for MOSL members and Open Water partners only in order to access controlled documents on this site.

Forgotten your password? Reset it here or download our guide on how to reset your password.


Sign Up

Please complete ALL fields below. Registration is for MOSL members and Open Water partners only in order to access controlled documents on this site.


Already a Member? Log in here

Forgot Password

Enter New Password

Document Versions