I transferred £10,000 into the wrong account – how can I get it back?

Somehow I managed to type the wrong sort code when transferring my redundancy payment into a new savings accountI am usually very careful with online banking but just before Christmas I appear to have inexplicably typed the wrong sort code when transferring a £10,000 redundancy payment into a new savings account with Birmingham Midshires. My money left my bank account but it has not turned up where it should have, and I am trapped in the nightmare of trying to get my bank, Barclays, to hel