Hi Dolt- how can they pay you without your account details ( as I'm sure the payroll is done by bank transfer and they won't issue a ceque/cash)?
There will be other people/organisations that also have your account details- anyone you give a cheque to, anyone you pay by direct debit/standing order (council tax/gas/electricity/phone etc).
I very much doubt your employer would ever want to access your accout even if it could.
Why don't I give you my account number and sort code and then you can transfer all your savings and current account surplus (assuming you are in the black) over to me.....