I thought I'd post this here since, if true, it probably has something to do with Heather. Anyone who actually saw the performance, please comment.
My girlfirend (who usually has great insight into people's psychological state) just caught Paul on a european news channel from his performance last night (Jubilee). Although she did not understand what they were saying - it was all Greek to her - she said that 1) Paul sounded great 2) He did not look happy, in fact looked uncomfortable in both scenes. In one he was playing Her Majesty, in the other he has listening to Charles speak.