Who won: TfL Renewable Corporate Power Purchase Agreement ('PPA Comet')

A goods contract from TRANSPORT FOR LONDON. Below: what it involves and how to write a winning bid for it.

Buyer

TRANSPORT FOR LONDON

Published

23 July 2026

About this contract

Transport for London (TfL) (contracting as its subsidiary, London Underground Limited) entered into a 15 year PPA ('PPA Comet') with a renewable generator, EDF Energy Renewables Limited (through its subsidiary Longfield Solar Energy Farm Limited), contracting for 80GWhs of renewable energy per annum from an 'additional' generator asset (Longfield solar farm, Essex).

Who won contracts like this

✓Answer against the marking scheme, not the question text — TRANSPORT FOR LONDON scores each response, so map your evidence to the published criteria and weightings.
✓Lead with evidenced capability and social value — for goods work these usually outweigh price.
✓Show recent, comparable delivery: name similar goods contracts you've delivered for public bodies, with measurable outcomes.
✓This one's been awarded — but TRANSPORT FOR LONDON retenders on a cycle. Get matched the day the next one lands and start your draft early.

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