Bank station has recenty finished phase 1 of its upgrade project. Phase 2 is soon to follow, starting in February or March, with further phases after that.
The station has had additional CSAs to ensure that the extra work generated by the project can be carried out. So you might think that those CSAs should stay on the station for phase 2. But management have a different idea - boot them out and let the SRT do the work instead. It is surely better to keep staff who have worked atthe station (which is, after all, the largest underground railway station in Europe) for up to two years, and are familiar with the station and its procedures, than to expect SRT staff to be thrown in at the deep end to do the job. Management's plan is unfair both on the existing CSAs and the SRT - and on Bank's staff and passengers in general.
Which is why the unions are objecting and why over 100 Bank group staff have signed a petition opposing management's daft idea.
Let's hope that makes management sit up and listen.