Unfortunately it appears the UK DTA doesn't exempt pensions, so you'll probably pay double tax in any pension brought into Thailand. Fortunately for Australians, pensions can only be taxed in the country in which they're paid (Big sigh of relief from all the Aussies!)
No need, it's confirmed in the DTA. Are you one of these people waiting for some grand announcement? It ain't going to happen because there's nothing to announce