2 Won't Do!
Management have a little ploy on stations - slipping in SS2s (or SSMFs) to work on SS1 stations. They did it last year at Warren Street, getting an SRT SS to help out on the night turn during the refurb. Now they are trying it at Waterloo, getting SS2/MFs from other groups to come and work on the station. And rumour has it that LUL reckons that 'escalator assist' Supervisors at Bank don't actually have to be SS1s despite it being an SS1 station!