The GBE-N Technical Partner Contract Stage 2 for the Wylfa SMR programme is estimated at £8.17 billion — covering full reactor design, development, manufacturing, supply, installation, and commissioning of three Rolls-Royce SMR units. Combined with the Stage 1 forecast of £359 million, the total TP contract is estimated at approximately £8.53 billion — the largest single nuclear technology contract in UK history. A final investment decision is required within five years of the TP contract start date.