Hi all, OP here. A quick update on my original query re not paying UK tax. I sent the relevant form to HMRC in early September last year and they finally got to deal with it on 29 April. Wonderful service ???? But...a very small box on the form needed to be completed by my local tax office here in Thailand and the very nice lady there would not do that. She registered me for tax and gave me a card but of course HMRC would not accept that, even though I had it translated for them. They told me the Thai tax authority DOES stamp/sign these forms as they deal with them many times. So now I will visit the Pattaya tax office who I hope have more experience in dealing with us farangs.