I dont think so that pictures together with fiancee is a must in applying visitors visa.Coz on my side i even dont hv it on my application and still ive got 3x visitors visa granted.Important i think, is to show that the applicant cn suport herself or himself to visit uk and ret with in the the duration period given before it expires.And invitation from somebody is a big help especially the person who invites is a british citizen which shows too, that u hv an address to go to when in uk.
