If this is any use,had a look on web and apparently a train coded 6Z31 has derailed at Bordesley Jct and all Camp Hill trains diverted via New St.66207 was sat in plat.8 at New St(0752hrs) with a tank train,Chris.
6Z31 is a Banbury to Mountsorrel train.
Tell me about it; used to see two 6M66s at the same time of the day but in opposite directions, guaranteed to confuse some people :roll:.......as strange as it sounds, there are still a few workings running about with the same headcode!