Got this from the citizens information website:
"If the version of the name to be entered on the passport differs other than in language from the version of the name on the birth certificate , you must provide evidence of usage for at least two years, e.g., bank statement, driving licence, credit cards, etc. At least two examples of such evidence should be enclosed with your application. A passport may be issued in the married name of an applicant if a civil marriage certificate is produced."