Cheers, Dave. It really does look like the kind of thing I adore -- and my friend would enjoy -- but we'll be using public transport rather than driving, and the logistics (i.e. 4-hour round trip to & from Heathrow by train) are a bit daunting (I think the *earliest* we'd get to Rochester would be 9 pm-ish), so I'm afraid we'll have to pass.

I will bear it in mind for next year, though...