3245 is stopped for Programmed lift - due back in December
3247 is stopped with a significant fault - again due back in December
3260 has been stopped long term as a test unit for a variety of modifications including a new Passenger Information System - due back at the start of December
3540 is also stopped for Programmed lift - due back at the end of October
3544 programmed lift as above end of December
Please take these expected return to service dates as best guesses!
The other units are not stopped. 3246 is working train 227 today, 3256 is train 243, 3262 and 3560 are both train 224, 3531 is train 207 and finally 3550 train 221...
As for 3411 - I was involved in a project about a decade ago that would have seen that brought out of long term storage and returned to service as part of a project to create two additional Bakerloo line sets from largely ex-Victoria line 1972 Mark 1 stock. But it was not to be... Whether is still extant I'm not sure it was parked long term on the Trotwood (West) side of Hainault depot and may be this vehicle shown on Google Maps:
3411? Equally, it is possible that it is no longer extant!