10 Lancasters from 424 and 433 Squadrons were ordered on a mining operation to Drevik and Portsgrunn. The crews were over the garden at 5,000 feet, sowing 48@1500 lb mines.

F/Lt G. MacLean from 424 Squadron returned early as the intercom was u/s.

P/O R. Saunders from 433 Squadron returned without mining as they could not find the pinpoint.