Thanks @carieoates, hope the ankle holds together, it's worth easing off a bit rather than risking further injury.
The Aquathlon was really hard, I swam faster than I'd wanted to in the pool and the route was very muddy and hilly. I came last for the challenge distance, but I'm not that bothered as it was a small field (19) and most of the others were triathlon club members. My wife did the short distance as well, and while we can't say that either of us enjoyed it, we are satisfied to have finished. The BBQ after was nice as well!
I have a half marathon this Sunday, but not as worried after that as it's really flat (Maidenhead).
Good luck with the training