Grey squirrels were introduced to the UK from North America at the end of the 1800s and so are not a native species. As grey squirrels have a varied diet they spread rapidly across the UK to become very numerous.
Trap & release is not an option for these animals. Once trapped and due to legislation it is illegal to release a grey squirrel back into the wild.
Grey squirrels are not protected under the Wildlife Act 1981 so they may be humanely controlled as squirrels can cause damage worth £1,000s to attics and roof spaces.
Red squirrels are protected. As red squirrels live in pine woods and tend to avoid contact with humans they are not considered pests and are no longer found (other than the Isle of Wight) in Southern England.