Staff at the Strawberry Field children’s home in the 1950s were used to seeing a skinny lad sitting in a tree in their grounds. The boy who climbed their fence to escape a troubled home life was John Lennon - who would have been 85 today (October 9) - whose experience inspired him to write one of the best-known songs of all time. Now, as the visitor attraction prepares to mark a major milestone in its history, Lennon's sister Julia Baird is keen to explain why Strawberry Field’s success - and