When i was at Jomtien for an extension, I had to renew my tm30. I thought maybe because I was ona visa exempt entry, so I clarified with the IO. Even if on a 1 year extension and leave Thailand, a new tm30 is required. That lesson cost 1600฿ 🤣
the main thing seems to be reasons to return to Thailand. The fact that she's had 2 already should make it a more straightforward process. I done letters from her family, letters from me, all financials. Only reason for going to UK is to spend time with you and your family.