 In the 1970s, he ran a small shop just off Notting Hill Gate, selling zodiac-related items.Bull wrote a book on the subject of teddy bears, "Bear With Me", and a book on his adventures on the Greek islands of Corfu and Paxos (where he owned a house), "It isn't all Greek to me", illustrated by Oscar winner Roger Furse.He was also the author of a non-fiction book about his experiences during World War II as commander of a Tank Landing Craft (LCT), "To Sea in a Sieve".