Did used at http://www.thelegaldeedpollservice.org.uk/ online, got 5 originals for some £+15 and I laminated one which render it useless but most people do not know this, at least it will last. Just fill out the online form, sign it, have someone else to sign it and send it all off with a cheque or postal order. Took a few days. Remember to change your title as well...

Then I suggest you change with the NHS first thing you get it, followed by passport, dvla, banks, work, tenancy agreement if you're renting. Keep in mind that you can as your banks to emboss your new cards with pretty much any combination of your new name and title. I got away with "Principessa Giovanna" even if "Principessa" is a royal title. Sweet.

Best of luck
Hugs
/Giovanna