"They may look like fish out of water but these brown trout are involved in a cunning escape plan.

Stuck in a fish pond, the trout are jumping 1m in an attempt to get into a pipe which measures just 20cm across – and has water rushing out of it.

As if that wasn't enough of a challenge, those that finally get into the pipe then have to swim 10m against a strong current before popping out into a river at the other end. "