"Wanderer" was deployed to the close escort group for Convoy JW 55B which was a part of the Russian convoys, sailing from Loch Ewe on 20 December when she had to rescue a young seaman that fell overboard; although they had him inboard with the doctor within seven minutes the cold killed him. The close escort group remained with the convoy well up into the Arctic Circle before they turned for home to refuel. A few days afterwards warships from JW 55B were involved in the Battle of the North Cape.