Have you reviewed the forum thread - All New Guide - How to apply for a Spouse/Partner Visa
It's important to follow the links too.
Think also about reviewing this information as many members have found difficulties in securing a marriage certificate for the visa application.
Advance Endorsement Birth ,Marriage and Death Certificate
There is a new requirement now for entry to UK for TB screening.
Please review this thread - TB Testing required from February 28th
Food for thought