The wind tunnel mimics flying conditions for the bat

The tunnel is made of smooth plastic so the mammals cannot find a foothold where they could rest.

An extractor fan recreates wind in the corridor and internal ledges have been included forcing the bats to navigate around the obstacles.

"This a major step forward in bat conservation and means bats returned to the wild will have a far greater chance of survival," added Mr Jackson.

Prototype

The 12ft tunnel is a prototype but it is hoped a fully developed model will become the standard home for helping injured animals return to their habitat.

Trying to teach bats that have recovered from injury to fly is almost impossible.

Mr Jackson said: "If they're released inside, bats just cling on to the nearest object and won't fly.

We've managed to get bats to fly for up to 20 minutes without resting which significantly improves their survival."