im glad the A + B shops are still operating as what is technically a Level 5 facility ...when I was there - seems like a lifetime ago the staple diet in A shop was 315,317,302, 321, 310,312, code 4's and casualty work .The B shop could handle almost anything above solebar..the Bigger unclassified code 5 work went to ZG1, or ZN1.
Ilfords competitor for work was Selhurst level 5...and we sent some strange stuff there...
310's for lock changing was always a puzzle for me( it was a repair capacity issue)...I recall a couple of sets being stranded over night awaiting movement back to East Ham because there was a brake release issue, the 37 that came to pick them up couldn't get the brakes off on the trip...everyone tried etc etc..wouldn't happen...anyway I think it was either a call to BY or EM and they went the next day...302s going down to ZG1 etc
shopping of the units and their overhaul sites was always quite interesting...
but that was the past and long time ago...over 25 years to be honest