OK different.
When my Thai wife came to England, with a Thai passport in her maiden name, we went to the Thai Embassy, they added an endorsement stamp to her passport stating that she now wished to be known as ##### #######, had to prove marriage, etc., never had any difficulties after with flights or Immigration either end using her existing Thai passport with the endorsement.
Don't know if this is possible with a UK passport, but if possible would retain your stamps and passport no until such time as you need a new passport.
Just a thought.