Hi, thank you for your question. Please confirm if you are in England or Wales?
Thank you for your question
My name is ***** ***** I shall do my best to help you
Whichever part of the Uk you are in you do not have to change your name on marriage unless you wish to do so.
However if you both wish to double-barrel your names following marriage it would be best to change your names using a Change of Name Deed (there are free templates available on line)
I hope that this is of assistance - please ask if you need further details