The wording on the back of this press release photograph reads,

"Associated Press photo from London, the P.1B at the Farnborough Air Show"

"The English Electric P1.B, supersonic all-weather fighter taxis along the runway for take off during the flying display and exhibition of the Society of British Aircraft constructors at the Royal Aircraft Establishment in Farnborough, Hampshire, today, September 3rd 1957."

"The P.1B is powered with two Rolls-Royce Avon turbo-jet engines with reheat."