I am an American in UK on tourist visa wanting to marry British fiance. We did not plan on marriage on this trip but now considering, thus I did not get the Marriage Visitor Visa. Terms prohibit marriage as a tourist in Britain but does that include in UK territory Gibraltar? I don't want to have an issue in future returning to UK. Thanks!

I am a US citizen in the UK on a tourist visa wanting to marry my British fiance. I did not get a Marriage Visitor Visa prior to this trip because we had not been planning on getting married, but we are considering it now that I am in the UK. The terms of my visa prohibit marriage as a tourist in Britain but does that include the UK territory Gibraltar? I don't want to have an issue in future returning to UK. Thanks!