Hi Tony
I am doing research for something and happened across your post and joined this forum specifically to answer - because I have just read a book about the Pratley family of Oxfordshire! The book is called "Traveller's Tale: The Making of a Fairground Showman" and is the biography of Walter Edward Reginald Pratley, known as Reg, who was born in 1895 and died in 1939. He wasn't born into the Fairground community, he joined it. The author of the book is David Slattery-Christy (Reg's grandson) and there are several family trees at the back. I couldn't find a Pratley born in 1955 because the trees are mainly concerned with the late 19th century and early 20th century, but you may well find clues in the book and in the family trees! The Pratley family came from Appleton and you can find some of them buried in the churchyard of St Lawrence's church there.