An exhibition at Pallant House Gallery explores the artist’s life and the change of style that contributed to him being out of favour     You could say that the seed for the exhibition Glyn Philpot: Flesh and Spirit at Pallant House Gallery was planted 20 years ago. Simon Martin, the director of the Chichester museum, was studying at the Courtauld Institute and doing work experience at Sotheby’s auction house when he first came across