Hi Steve,
I've checked Tony Woods claim list
http://www.lesbutler.ip3.co.uk/tony/tonywood.htm
The following luftwaffe claims are known for that night.
Reichsverteidigung: R.A.F. Bomber Command: MÜNCHEN
21.12.42 Ofw. Kurt Kastern 7./NJG 4 Halifax
£ 25 km. S.E. Sedan: 4.000 m. 19.32
21.12.42 Hptm. Heinrich Wohlers Stab II./NJG 4 4-motor
£ 5 km. südl. Void-Vacon: 2.500 m. (Meuse) 19.41
21.12.42 Ltn. Christiner 5./NJG 4 Lancaster
£ 4 km. W. Rumont: 4.000 m. (Meuse) 20.04
21.12.42 Hptm. Heinrich Wohlers Stab II./NJG 4 Stirling
£ Minecourt: 3-4.000 m. 22.56
21.12.42 Hptm. Heinrich Wohlers Stab II./NJG 4 Wellington
£ 2.5 km. W. Matignicourt: 1.500 m. (Marne) 23.13
21.12.42 Ltn. Rebdaus 1./NJG 4 Lancaster
£ 15 km. S.E. Maubeuge: 2.600 m. 23.16
21.12.42 Oblt. Karl-Heinz Kamp 7./NJG 4 Stirling
£ 24 km. S. Flôret: 2.700 m. 23.20
21.12.42 Hptm. Wilhelm Herget Stab I./NJG 4 Lancaster
£ 1 km. W. Steenbuyne: 3.000 m. 23.36
21.12.42 Ltn. Heinz Schnaufer Stab II./NJG 1 Lancaster
£ 21/2/3I2: 2.700 m. 23.53
21.12.42 Oblt. Reinhold Knacke 1./NJG 1 Lancaster
£ 52/2/1: 500 m. 24.00
The name you mention is not among them, perhaps he was a gunner or radar operator?
Dennis