I bought the whole box set of these books - eight in all - some twelve years ago specially for Paul Sample's stunning illustrations. I've actually read most of them and they are incredibly funny - Sharpe is a master at creating these stuck-up characters, oblivious to how they are affecting people around them which leads to tragic situations - always hilarious though! "Porterhouse Blue" was adapted for a TV series for Channel 4, starring David Jason and "Wilt" for a 1990 film with Griff Rhys Jones and Mel Smith. "Blott On The Landscape" was also made into a mini TV series in 1985, starring David Suchet.
Couldn't find any information on R.M. Turvey who created these beautiful pictures for thi and a number of other Nicolas Bebbington books. This is a first edition book and the printing quality is superb but, annoyingly, the publication date is nowhere to be found! - perhaps there is a page missing. I am guessing from a quick search on the internet that it was published in the mid to late 1940's.