It appears to be based in Prescot Street, Lomdon but it may be an international sortcode. It appears to be used in a few email scams. I hope you haven't been sending money to a Nigerian prince or a lottery win admin fee.
Abbey sort codes are not actually allocated to a specific branch like other banks.
It is an Abbey sort code though, and probably a savings account sort code as their bank accounts are usually 09:01:26.