Hi Joe Bloggs! I am a little confused by what you have wrote. My thorough investigation into Home Office and British Embassy website tells me something different (if I have understood them and you correctly). I read somewhere that they do not want you to apply for extension to your visa more than 1 month before expiry date - maybe that is the ILR - I will look again. If you did it says your application would be ignored.

Surely an FLR is the same as a spouse visa? Why would you get a spouse visa and then apply for FLR afterwards if you already have spouse visa? The person was asking about FLR after fiancee visa.