First Aberdeen · First Berkshire & The Thames Valley · First Bristol · First Cymru · First Devon & Cornwall (including Truronian) · First Eastern Counties · First Edinburgh · First Essex · First Glasgow · First Hampshire & Dorset · First Midlands (First Leicester, First Northampton, First Midland Red, First Potteries (Stoke area)) · First London · First Manchester (First Chester & The Wirral, First Manchester, First Potteries (Northern area)) · First Somerset & Avon · First South Yorkshire · First West Yorkshire (First Bradford, First Calderdale & Huddersfield, First Leeds) · First York · First Student UK · Greyhound UK
First Capital Connect · First Great Western · First Hull Trains · First ScotRail · First TransPennine Express (55% with Keolis) · Heathrow Connect · DSBFirst (25% Danish, 30% Swedish with DSB)