Dustboy, the sentiment is appreciated but this is a man made reservoir for Anglian Water so save for the foot or so of goose crap that lingers at the bottom of most open water. In this instance I won't be smashing PB through fear!
MA - Great shout. I'm also in for 2 miler. 8AM kick-off. It's on my patch (family home is less than 1/2 mile away).
Insofar as cycling in the area, it's nice and flat. Alternatively there is a nice 7-8 mile hardcore (in the product rather than rating sense of the word) pathway that loops around Alton Water. You can run comfortably but would want more than a road tyre if taking a bike.
I shall be getting in some practice on the beers Friday night before - helps me float better but could do with committing to a sensible length cycle (40-70 miles) on the Saturday afternoon if a tour guide is required.
Rw