My GP repeatedly tells me I'm doing far too much exercise, even when I'm doing 30-35 miles running a week running let alone when I'm doing 12 hrs plus for an Outlaw. Then again he tells me at 80kg and 5ft10 I'm 15-20kg over weight. You'll be fine, knackered but fine. You might well walk most of the run and be bloody knackered, but you'll be fine.
In other news my leg still has a crack in it and I have a removable boot on. Was proper painful after 120km bike on Sunday.
I think the water has to be tested by a microbiologist before OW swimming is permitted, almost certainly before a BTF event, Buddha would know more. I've certaibly never had any problems at Stanton and I've far from a robust stomach. The water at HPP last year didn't taste or smell that clever because of rotting weed but I didn't suffer afterwards. Probably worth covering any cuts especially lower extremities if you are diabetic.
I was on some of the bike course on Sunday and was passed by a few tri bikes including a very fast woman on an unusual shaped bike, although I was chuffed to catch and pass a bloke on a Shiv with his pointy hat on. I went from Kings Bromley through Abbots Bromley and over Cannock Chase.
Anyway, I think you'd be ok on the TT bike. I'm a hopeless climber, always have been, but I went up Cannock Chase in the 36-21/23 mostly sat down and that was the worst climb. The road surface was never that rough compared to some S Staffs roads with worn surface dressing. By Whittington GC I'm looking at you. What did catch me out from time to time was the wind, it wasn't strong, but it was tugging at me a few times especially over Blithbury with 50mm tubs on. Horseshit, mud from fields and a distressingly large number of dead animals from rats to badgers and a deer were the main obstacles.
A good learning point for me was I started out with the intention of a steady ride but ended up riding for 20-25 miles with two random cyclists, sharing some 2-3 mile hard stints on the front with one of them, by the time I'd gone my separate way and gone over Cannock into Hendesford I was on my arse. Two weeks ago I did 30k more and was fresh for a run. Don't let the flat roads or an inevitable W/SW wind pushing you along make you crack on too fast and knacker your run. Too many times I've headed NE or E from Birmingham too fast and struggled back in the prevailing Westerlies.