A wildlife trust has said it is "excited" at the discovery of a type of tiny vulnerable snail at one of its nature reserves.

Wiltshire Wildlife Trust said it was previously unsure if there were any Desmoulin's whorl snails at Smallbrook Meadows in Warminster, but some have been found there for the first time.

Volunteers carried out a fingertip search through mud with the aid of magnifying glasses to find the 2mm (0.07ins) creatures.