Conversation so far:
when did Humphrey Lyttelton's career first start to take off
On VE Day, 8 May 1945, Lyttelton joined in the celebrations by playing his trumpet from a wheelbarrow, inadvertently giving his first broadcast performance; the BBC recording still survives.
where did Humphrey Lyttelton go to school at
Sunningdale Preparatory School
what country/state was the Sunningdale Preparatory School in
Sunningdale in Berkshire, close to London, England

Question: is there something big that changed his life
Self-contained rewrite: is there something big that changed Humphrey Lyttelton's life