41 Lancasters from 419, 428, and 431 Squadrons were joined by 4 Halifaxes from 434 Squadron in an attack of the Nippes rail yards at Cologne. The crew were over the target at between 14,000 and 19,000 feet, releasing 537,000 lbs of high explosives. According to reports the target was cloud covered. There was some damage to the rail yards but most missed.

F/Lt H. Cave from 419 Squadron was not successful as the navigation aids were u/s at the French coast. They attempted to navigate by dead reckoning, but no T.I.s were seen and the load was released into the North Sea. 

F/Lt B. Adilman from 431 Squadron landed at Woodbridge on return.

This was the last operation that 434 Squadron flew the Halifax III. They were now converting to the Lancaster X.
 
 

While some of the crews were operating against Cologne, 11 Halifaxes from 424, 427, 429, and 433 Squadrons were ordered on a mining operation to Oslo. They crews were over the garden at between 10,000 and 14,000 feet, sowing 24@1500 lb and 24@1850 lb mines.

F/O A. MacKie from 424 Squadron returned early as the hydraulics were u/s.
F/Lt J. Stalberger and F/O D. Chance landed at Charterhall due to poor weather at base.

F/O J. Smart, F/Lt J. Murphy and F/O T. Wagar from 427 Squadron landed at Charterhall due to poor weather at base.

F/O C. Gray, F/O C. Lee and F/O F. Biddell from 429 Squadron landed at Charterhall due to poor weather at base.

F/Lt D. McGrath from 433 Squadron returned early as the stbd inner was u/s. They landed safely at base on 3 engines.
F/Lt P. Holmes landed at Charterhall due to poor weather at base.