Many thanks both all has been done as you suggested. It’s a multi entry Visa. Unfortunately, as you expect that have been a couple of posts that let’s just say haven’t been entirely helpful, but they are easily ignored

Thank you for your responses. Immigration of the main office were very helpful.

Having asked the immigration officer directly how long UK citizens are allowed having entered Thailand to update their new passport with the previous stamps, the answer appears to be there is a little flexibility but up to 30 days .

The cost is 500 baht and I am required to report to Immigration in Bluport every 90 days to confirm my residence.

I hope this is helpful to others

@Jan *****************

many thanks Jan, I do appreciate it. It should save me some time in Immigration and put my mind at ease.

Many thanks to everyone for your helpful advice. I have decided to renew my UK passport early and when I get to Immigration in Bangkok, I will hopefully be able to transfer the Thai retirement Visa stamps over from my old passport to the new one.

@Simon ********

many thanks Simon. I appreciate your reply.

@Roberto ********

many things. Have decided to renew early as it effectively means it’s only cost me £10 in losing a year and it gives me the flexibility when I come back in April to travel around Europe without the ““six months” issue

Many thanks for all your comments and they were extremely helpful. In particular, I would like to thank Michael Knight who pointed me towards my nationwide flex plus account which gives me 120 days comprehensive insurance at a cost of about £400. If I stay longer I can use the Safety Wing essential nomad insurance on a pay as you go basis at a cost of about £130 a month. The SafetyWing policy is one of the very few that you can take out when you are already abroad travelling once again many thanks to everyone.