You have to fill out an FLR (M) form to be qualified for a UK Spouse Visa extension after 2.5 years in the UK. Also, most of the time, you will need to meet these conditions:
- Proof of financial stability
- Prove you can speak English at an A2 level (unless you’re excused)
- Currently in a real relationship and plan to stay together in a suitable living space
- Adhere to the character fit requirements, which concern your behavior, character, and prior immigration history
- Your immigration status must be lawful in the UK
When you apply for a spouse visa extension, you need to show proof that you are in a genuine relationship with your partner. If these things are true about your visa renewal, you may remain in the UK till you can file for ILR.