Not so long ago, hot days lazing by a river pool or lake were as much a part of summer as bicycles and ice-creams. The best sections of rivers – those with a secluded sun trap, clear water, or a deep pool – sported rope swings hanging from trees and makeshift diving platforms.

If rumours of a scorching summer are true, we should be spoilt for opportunities to remake these sorts of discoveries.

This list of 10 great swims has been recommended by members of the Outdoor Swimming Society, a volunteer not-for-profit group that promotes swimming in Britain. To find more swims near you, all you need is a bit of common sense, a bit of research (visit the OSS website for safety and planning information) and a readiness to ask. You'll be amazed who knows where to go. What are you waiting for? Jump in.