Just do it, nyzzy, you don't have to do anything more than that, just start using your maiden name. The documents you need to change will be your passport, driving licence, car insurance, medical and dental records, and your bank and any card issuers. I have kept my previous name for work but changed all those documents so there would be consistency when I travelled or needed healthcare. You don't even need to tell the tax office - the taxman told me he didn't care what I called myself, as long as I kept the same NI number!