I seem to remember that he did a couple of "Farewell Tours" maybe as long as 10 years ago, but then posted on his website, "Forget the Farewell Tours - I'm having a ball!" and carried on! But guess this time it could be for real.
Got my first taste of his music when one of my flatmates brought me back one of his LPs from the USA back in 1966: that was me hooked. Saw him live several times in the early days, then a very long gap, until several Scottish tours in the last 10 years: Linlithgow, Edinburgh, Glasgow: always a heart-warming experience.
I'd have thought his singularly best-known/most popular song in the UK was "Last Thing on my Mind", tho' the Zoo song is also a favourite.