Ur friend can apply FLR right away eventhough her Fiancee Visa is not yet expired as long as she got all the documents needed..i.e. Marriage Certificate.
FLR application if submitted through post will gonna take 3 to 4 weeks and it cost £395, but if she is really eager to work she can apply FLR in person and she can get it the same day and it cost £595.
You can check it here..
http://www.ukba.homeoffice.gov.uk/uk...ontype/flr(m)/
http://www.ukba.homeoffice.gov.uk/si...r/formflrm1108
Being married to a British National doesn't give us an assurance that we can work straight away here in the U.K. we still need to follow certain rules and legalities..
Hope it helps.![]()