150127 arrived from Willesden T&RSMD on Saturday 10th with 150121 due next after it has some repairs completed at WN. I hear a rumour that London Midland decided at the last minute to use existing 150s and (once crew training is completed!) 153s on the Bedford to Bletchley which the DFT▸ (Department for Transport) had planned to be resourced by hired-in London Overground 150s. This left two spare 150s at London Overground which they returned to Angel Trains - FGW▸ (First Great Western) found out very quickly and snapped them up!
The differences between 150/1 and 150/2 is pretty minimal and on most other TOCs▸ (Train Operating Company) crews hold the two units as one line on their competency card. And, as you say, most drivers and Guards much prefer a stroke 1 to a stroke 2!
The Silverlink MD Mark Hopwood is FGW bound so he's bringing two of his old trains with him - SL 150s have always been very reliable!