Build a pond for your plot
Why not make a new pond on the allotment – now is a good time to do that- you can either use a pre-formed one – look on freecycle – or use a liner. Choose an open sunny site, away from over hanging trees and try and make it level – if not all the water will end up at one end! The deepest bit should be in the middle and need to be 50cm (just under 2ft). Try and make a ledge around the edge to stand plants on and make a beach area that slopes down gently into the pond if you can.
To work out the liner, and rubber Butyl is best but quite expensive, measure the length and breadth of the pond, then add twice the maximum depth to each of those measurements. Try and line the pond with landscaping fabric first so that the stones don’t rip the liner.
If you don’t want a full blown pond then use a large bowl or any other receptacle as any amount of water will attract frogs, toads dragonflies etc.