"Aircraft of the Royal Air Force 1939-1945- Handley Page Hp.57 Halifax." Halifax Mark I Series 1, L9503 ‘TL-P’, of No. 35 Squadron RAF based at Linton-on-Ouse, Yorkshire, ready for inspection at Northolt, Middlesex, during a visit by the Prime Minister. L9503 flew on many of 35 Squadron's early operations before it was lost attacking Hamburg on the night of 15/16 September 1941.