PS
My friend has just started drawing his State Pension (he's 67 so 10K pa). They've not taxed any of it so he phoned HMRC and DWP from T/land via Skype. One was free, the other cost him.
aseannow.com/topic/1301846-press-release-end-frozen-pensions-for-british-ex-pats-in-thailand/page/6/#comment-18486747