still not too sure but from where i am (devon) its 1000miles so i think i'm gona do it over 3 days and doing 350 miles a day probably gona stop just in France on the first night (getting the tunnel i think as well to save time, time is my biggest enemy on my 90 lol).
350 miles a day should be a push but do-able, I don't mind pushing myself to get the journey done a bit quicker.
When it comes to the slippery cold stuff on my c90 I'm quite good at it (also ride enduro on a 610), what i found the best thing to do is get some rope and wrap it round the rear tyre to make a crude snow chain. here's a couple of photos of me being used a ski-lift on dartmoor towing snowboarders and sledges up the hills.
can't find the ones of the snowboarders though, earnt quite a bit of money that evening too.
good old little 90