You said "renewing my FLR (M) visa". Did you enter on a different visa and switch to FLR(M), and now you need to apply for a second FLR(M)? Or did you enter on a spousal visa, and now you are applying for your first FLR(M) extention?
Applying for FLR(M) is very similar to the initial spouse visa, except:
- Instead of providing proof of communication while you were living apart, as you did for the spousal visa application, you will provide six jointly-addressed or twelve individually-addressed bits of post sent to you and your spouse in the last 2.5 years (about one item each every 5 months), that are from at least three unique official sources, to prove you live together. The acceptable sources include things like government agencies, NHS, utilities, banks, etc. Personal letters do not count. This, along with your marriage certificate, constitutes your proof or relationship (no photo required this time, either).
- If you are using wages from employment to meet the minimum income threshold, both the sponsor's and the applicant's income can be counted now, because the applicant has the legal right to work in the UK.
- The FLR(M) application is submitted from within the UK.