Energy and Utilities
Market wide half hourly settlement is not optional and the deadline is not soft: from 28 October 2026 suppliers that are not ready cannot take on new customers. Independent, delivery grade support for suppliers and agents working through migration and qualification.
PEF Consulting Partners supports energy suppliers and agents through market wide half hourly settlement from direct settlement experience: our leadership resolved imbalance and settlement issues with E.ON Next during its Kraken transformation and has delivered against Elexon and BSC obligations throughout a career in the UK energy market. MHHS is a data, systems and operations programme wearing a regulatory name, and we treat it as one.
The programme replaces profiled settlement with settlement on actual half hourly data for every meter point. That changes your data volumes, your agent relationships, your systems and, for suppliers, your commercial exposure to imbalance. Migrations are running now, and suppliers that miss the deadline face restrictions on taking new customers. The honest test of readiness is not whether your project plan says green, but whether your data flows, qualification evidence and operational processes would survive contact with the new arrangements this month.
Our lead offer. Fixed fee from £2,500, one to two weeks.
An independent, honest view of your migration and qualification position: data, systems, agents and operations, with the gaps ranked by settlement risk, so you know what to fix first.
Senior programme leadership through migration cohorts, data reconciliation and cutover, applying the same disciplines as any billing migration.
Resolving settlement errors and imbalance exposure as the half hourly data lands, before they become revenue leaks with a regulatory audience.
Preparing your operation and your agent relationships for business as usual under the new arrangements, not just for the migration date.
Compliance with MHHS is not one test on one day. Each milestone asks something different of a supplier, and each can be missed for a different reason.
Our assessment tests each one against the evidence you hold today and tells you which puts you at risk, in order of urgency.
The Market wide Half Hourly Settlement programme is the industry programme, led by Elexon under Ofgem’s direction, that moves every electricity meter in Great Britain onto half hourly settlement, so suppliers are charged for energy based on when their customers actually use it.
New systems and processes to receive and use half hourly data for every customer, migration of meters onto the new settlement arrangements, changes to forecasting and hedging, and new performance obligations under the Balancing and Settlement Code.
Smart meters record consumption in each half hour. Under MHHS, suppliers and their agents collect that data for settlement, subject to the data access rules that apply to domestic customers.
How accurately and promptly suppliers and their agents provide the meter data that settlement needs. Under MHHS it is measured against new performance standards, and poor performance affects both costs and regulatory standing.
Four things across three dates: systems that accept meter points under the new arrangements by 28 October 2026, qualification for the new market roles for you and your agents, every meter point migrated by 7 May 2027, and settlement performance that holds up once the four month timetable starts on 2 July 2027.
A supplier whose systems cannot accept meter points under the new arrangements cannot take new customers until they can, and reverse migration ends, so migrated meter points cannot return to the old regime. The lost growth usually costs far more than getting ready.
M15 on 7 May 2027, the date by which every meter point must be migrated, then M16 on 2 July 2027, when settlement moves to a four month timetable. Being ready for M14 is only the first test.
The 60 second audit above will show you where you really stand. If you would rather talk it through, a short, confidential conversation costs nothing and commits you to nothing.