Class 221 - units 221142 and 221143

[AlistairCowell]

As I understand, the last four Class 221 units to be built for Virgin Trains, units 221141 to 221144, were originally four-cars (the rest were five-cars).

But around 2010, units 221142 and 221143 were extended to five-cars by taking vehicles off unit 221144.
Unit 221142 received 60994 (an ex MSL(A) vehicle), while 221143 received 60794 (an ex MSRMB vehicle).

As a result, does that mean that the unit formation for units 221142 and 221143 are different from the rest of the Class 221 fleet?

 

[sprinterguy]

It did mean that 221143 had two shop vehicles as you note.

However, since Crosscountry resurrected unit 221144, there's been some reformation of 221142 and 143 so that they're now formed:

221142 60392-60992-60986*-60792-60492
221143 60393-60993-60994**-60793-60493

*Motor Standard vehicle formerly in 221136.
**Motor Standard vehicle originally in 221144, then latterly 221142.

Both units therefore have two 609xx MSL(A)s, whereas all other 5-car 221s each have one 608xx (MSL(B)) and one 609xx (MSL(A)).