I can't bear the thought of another Christmas stuck in front of the telly in dreary old England! Easyjet flys from Liverpool or East Midlands to Cologne/Bonn. Or L'pool to Berlin.
Is anything open in Cologne on Christmas Day & Boxing Day?
The christmas market? Beer halls and pubs in the AltMarkt? Shops?
Do DeutscheBahn trains run on Boxing day?
Bruce