9 Squadron aircraft experienced engine problems during the climb, and returned to the UK. The bombers met over Torneträsk lake, formed up into their attack formations and proceeded to Tromsø. During this flight the Lancasters climbed to their bombing altitudes of between .
Aircraft from 9 Squadron encountered engine issues during the ascent and were forced to return to the UK. The bombers converged over Torneträsk lake, formed up into attack formations, and headed towards Tromsø. As they flew, the Lancasters reached their bombing altitudes of between .