Chemnitz; 760 aircraft - 498 Lancasters, 256 Halifaxes, 6 Mosquitos - to continue Operation Thunderclap. The operation started badly when 9 aircraft of No 6 Group crashed near their bases soon after taking off in icy conditions. No 426 Squadron, at Linton-on-Ouse, lost 3 out of their 14 Halifaxes taking part in the raid in this way, with only 1 man surviving. 1 of the Halifaxes crashed in York, killing some civilians. 22 further aircraft were lost in the main operation - 14 Lancasters and 8 Halifaxes.