Great Actor remembered for it Aint Half Hot Mum and Carry On but so much more , he even had a Number one single with Don Estelle [Lofty from IAHHM] with Whispering Grass, made famous by the Inkspots , although to be fair Don Estelle was the singer Windsor voiced parts of the song in his Sergeant Major Williams role .
He made Never the Twain, which was quite successful, with that other great theatrical "shouter" Sir Donald Sinden. When you look him up he had a very long and diverse career starting in the early 60's , the role of Sergeant is a regular occurrence however, but for example he played the role of the Monk in Canterbury Tales. I think he would have been a shoe in for a role as one of the three main leads in our beloved show but as far as I know I suspect he was never asked.
As I mentioned in the thread about LOTSW actors and actresses who are still alive often you don't hear anything about these stars who brought us such pleasure until they so sadly pass away and this is yet another example . A very sad loss.