Thanks for all the advice people, I’ve had R&G’s bar ends recommended a few times so will try and track a pair down today, as I’m off work feeling really terrible ;), will let you know how I get on with my upcoming 1000m round trip 
I doubt very much whether R&G Bar Ends will solve your problem. It’s far cheaper to try and adjust your posture before spending money on them.
It sounds like you need to try and relax your upper body, bend your elbows, lean into the bike, grip the tank with your knees and only grip the bars lightly.
Give that a go for a few days before buying R&G’s, which IMO make no difference to a V twins vibes
If you do go for a set of bar ends make sure the weighted, they do not have to be R&G any decent Heavy/weighted bar end for your bike should help.I not saying it will solve the problem, but it should go along way to making it better.
If it persists, it might be worth a trip to the doc’s. Carpal tunnel has been mentioned. Also reynaud’s/white finger syndrome. Sorry to be miserable, but it’s a possibility.
Ok, advice taken on board, will save myself a few £’s for now and see what weird and wonderful positions I can come up with over the next 6 days…far cheaper I agree