Just an update,
my fiancee just phoned me and he said that he got an answer to our query,
http://www.ukba.homeoffice.gov.uk/po...onrules/part8/
Extension of stay as a fiance(e) or proposed civil partner
294. An extension of stay as a fiance(e) or proposed civil partner may be granted for an appropriate period with a prohibition on employment to enable the marriage or civil partnership to take place provided the Secretary of State is satisfied that each of the requirements of paragraph 293 is met