You don't have to notify anyone that you are BR unless you are applying for credit of more than £500.
I can't say whether you would be credit checked when working in a call centre for a bank but I would doubt it. You are not dealing with actual finances but assisting people with their queries or maybe even chasing people for their unpaid debts???
Generally when you start work for a company via an agency you won't be subject to the same background checks/interviews that you would be if you were hired by the company themselves.
Edited by - gettingoutofdebt on 12 January 2010 06:51:57