The British government does not register overseas marriages. The best you can do is deposit you foreign marriage certificate with the GRO but this is not needed for immigration purposes. see the guidance from the British embassy below.
Depositing your marriage document is not a legal requirement.
You are unable to register a foreign marriage in the UK. As a general rule, as long as your marriage is valid and legal in the country in which it took place, it is likely to be recognised in the UK. If you are in doubt as to the legality of your marriage, please consult a solicitor.
Also see
http://ukinperu.fco.gov.uk/en/help-for- ... arriage-or