Market-wide Half Hourly Settlement
MHHS is rebuilding the market around half hourly data.
By May 2027 every electricity meter in Great Britain will be settled on real 30 minute consumption rather than profiles and estimates. That changes what clients see, what suppliers price against, and what they expect from the broker who advises them.
See the platform we give partnersAbout the author
Josh Coleman
Head of Channel
Josh has day-to-day operational control of the channel, overseeing our BDM team and our sub-broker partnerships, with over 15 years in the industry gained working with leading B2B suppliers and aggregators.
Free white paper
Will MHHS be the end of the procurement-only TPI?
The reform
MHHS is rebuilding the market around half hourly data.
MHHS is an industry-wide programme, sponsored by Ofgem and delivered by Elexon, that moves the settlement of every electricity meter in Great Britain onto half hourly consumption data. Today most non-half-hourly sites are settled using profiles and estimates. Under MHHS, actual usage in each 30 minute period is what gets settled, billed and, increasingly, priced.
Ofgem expects the reform to unlock between £1.6 billion and £4.5 billion in net consumer benefits, largely through accurate billing, time of use pricing, flexibility services and better demand management. Profile classes and legacy codes are being phased out for migrated meters, and suppliers are already redesigning products around granular data.
The market is being rebuilt around half hourly data. The question for TPIs is how well placed they are to put that data to work for their clients.
Key milestones
The MHHS timetable
October 2025
Migration begins
Meters start moving onto the new half hourly settlement arrangements, with the bulk of migrations running through mid-2026.
October 2026
Around 80% migrated
Most electricity meters in Great Britain are expected to be settled on real half hourly data rather than profiles and estimates.
May 2027
Full migration completes
Every electricity meter, from the corner shop to the corporate estate, is settled on actual 30 minute consumption.
July 2027
Settlement shortens
The settlement timetable drops from 14 months to 4 months, with Elexon processing up to 500 billion readings a year.
The role of the TPI
An uncomfortable question for our industry
A large share of the UK's TPI market has been built on a straightforward and honourable model: know the suppliers, gather the bills, run the tender, place the contract, collect the commission, diarise the renewal. That has worked for twenty years because information was hard to come by. The broker's advantage was access.
MHHS reduces that advantage. When settlement-grade half hourly data exists for every site and can be surfaced in seconds, the information gap that pure procurement depends on narrows. Clients can see their own consumption. Suppliers price to it. The Energy Consultants Association has already warned that brokers who stick to traditional procurement alone risk being overtaken by competitors who move into data-led advisory work.
Procurement will always matter. On its own, it is no longer enough.
The renewal letter and spreadsheet approach will keep working until a competitor sits down with your client, brings up their half hourly data on screen, points out the overnight baseload they are paying for, puts a figure on it, and asks whether their current broker has ever shown them this.
Rising expectations
What clients will expect in a data-first world
From accurate bills to accountable advisers
Bills will reflect real half hourly usage. A hospitality site drawing most of its power at peak evening periods will see that priced in, and clients will bring those questions to their broker, not their supplier.
From annual renewals to year-round visibility
Energy stops being a once a year purchasing decision. Clients gravitate towards advisers who are visibly present between renewals, not just at them.
From price talk to carbon numbers
ESG reporting, SECR and supply chain questionnaires all need defensible consumption and emissions figures. Mid-market clients increasingly expect their energy adviser to provide them.
From trust me to show me
Ofgem's scrutiny of the non-domestic market points towards transparency. A broker who can put verified data behind every recommendation is on the right side of that.
The comparison clients will make is simple: one TPI offers procurement alone, another offers procurement plus live consumption, cost and carbon visibility at no extra cost. Most clients will take the second.
The practical answer
Closing the gap without building a tech company
Building an energy management platform takes capital and developers most consultancies do not have, and licensing an off-the-shelf product can cost thousands a year across a client portfolio. Every Tritility partner gets a white labelled platform, powered by Envisij, included at no charge. No licence fees, no per-user costs, nothing for your clients to pay.
- Consumption, cost and carbon in one view, tracked in 30 minute intervals.
- Emissions calculated per kWh for ESG, SECR and net zero reporting.
- Overnight loads, standby waste and peak periods identified.
- Any half hourly supply live in seconds. No hardware, no supplier change.
- 100% white labelled. Your logo, your name, your colours.
Talk to your regional BDM today.
Book a 30-minute slot directly in our calendar or contact our partnerships team to arrange a call with us. A real person — usually your regional BDM — will get back to you the same working day.