All the weather forecasters.com can't agree, so I think we have to accept that there is a chance of rain, but probably not enough/long enough for wet tyres. This is just what you need for a real 6 hour race (can we get rid of this 1000km thing - it was 500 miles till they got faster.)
Please have one or two for me, as I'm driving to Castle Combe with an 8 am kick off. Please pm the recipe for Tropicoma before 8pm as I'll need it