Complex sentence: The next two planned operations were both cancelled and it was not until 1942, that No.4 Commando took part in another raid, Operation Abercrombie, a raid on the French coastal town of Hardelot.
Split into simpler sentences: The next two planned operations were both cancelled and it was not until 1942, that No.4 Commando took part in another raid. That was Operation Abercrombie, a raid on the French coastal town of Hardelot.