New no. - Old no. & Centre Coach no.
150003 - 150116 & 57209*
150004 - 150112 & 57212*
150005 - 150117 & 52224
150006 - 150147 & 57224
For those that are clued up on seat types, 003 and 004 will have Ashbournes, 006 will have Chapmans.
005 will be an oddball as it’ll have Ashbournes in the /1 coaches and Chapmans in the centre /2 coach. It’ll also be the only unit out of the new 3 coach sets that will have two accessible toilets rather than one
The seemingly random choice of units was down to C4 exams being similar in mileages in the current units, making it easier when the coaches are reformed
*For those that are less knowledgeable on numbers, coaches 57209/57212 formed set 150209 as the 52 coach equivalents on both units were written off decades ago, meaning that (as well as 150212 not officially existing,) the current 150209 isn’t PRM compliant (only 52 coaches are), heightening the need to split this particular unit and insert the coaches into PRM compliant 150/1s.