Librarian Note: There is more than one author by this name in the Goodreads database.
Born in Cheshire in 1928, Robert Leeson was a journalist for forty years, interrupted by army service in Egypt. He began to write for children in the 1960s and has had over 65 books published. In 1985 he received the Eleanor Farjeon Award for services to children's literature. Also published as R.A. Leeson
"Meet Kitchener Candeford, (Candy to his friends), an orphan who dedicates his life to the highest ideals and is punished accordingly. Candy is one of life’s special people - a great strapping lad with a very serious and gentle disposition. He is totally innocent and has a knack for getting into trouble wherever he goes because he lives according to his principles and compromise is unthinkable. At the age of sixteen Candy is expelled from St Joseph’s School, where he has lived all his life, after causing a brawl when defending a woman from her drunken husband. Out in the cold cruel world, Candy learns the hard facts of being in and out of work. Thanks to his good intentions, he’s once again branded as a troublemaker. The only person who has faith in him is Molly, a tea girl at Woolie’s with grand ambitions. Unemployed and at a loose end, Candy teams up with Lord John, his aristocractic friend from school, and goes up to London. They join the Army and are sent to a desert outpost in the Middle East. The Army offers new scope for Candy’s talent for catastrophe.... Set in the 1950s, this is a novel about teenagers in the days when the word was . just invented - when Bill Haley’s Comets blazed on the rock n’ roll horizon and when thousands of young soldiers served in the world’s troubled spots." - free to borrow from OpenLibrary
(and that 'aristocractic' is a (sic) - straight from the book jacket)