Challenge is getting each upload under .5mb.... save the scans as pdf files then search Google for a pdf file reducer/file shrinking software.
The system is really slow so do not expect to do in in a couple of hours.
Item 8 is proof of your UK address. Should be obvious from your bank statements but I included a copy of a water rates bill as well.
Scan of wife's blue house book will be fine.
You will only get 90 days single entry from London though... so then you are either into having to leave Thailand and applying for another visa or extending for a year which drags in the issue of locking up 400,000 thb in a Thai bank account 😣
Good part is not having to send in the physical documents you have scanned.. just the barcoded document and passport.. 😉
Mandatory Health Insurance for OA visa deffo on the UK Embassy site. Can't see any UK company ever filling in the required insurance certificate details either..😣
Travel insurance is a good investment and not to be confused with the new OA visa requirement for HEALTH insurance. Some UK banks offer travel insurance as part of their current account packages that's very economical.