Thanks for all the options everyone. I ended up ordering 2 on line, the first is a WMF Profi Plus Stainless Steel Can Opener and a backup Kuhn Rikon Auto Safety Lif Lifter as I couldn't find the WMF Profi Plus Safety Can Opener available online in the UK. If all else fails then I can just use the can opener on a British Army Knife (more efficient than a P38, Leatherman and SAK can opener etc). Hopefully the Germans and Swiss have got their can openers worked out.