The Red Squirrel (these are not the greatest pals) and the Grey Squirrel. 
It is the grey squirrel that is the pest.

Reasons for control.

Grey Squirrel:

• They can cause serious damage in roof spaces in houses by chewing area including electrical wiring
• In the garden they take fruit
• They raid the nests of small birds
• Dig holes in gardens to bury their nuts
• They can damage trees by stripping the bark.

• They out compete the native Red squirrel.

Biology.

• Grey squirrels are not native to Britain and were introduced from the USA in the late nineteenth/early twentieth century
• Grey Squirrel (Sciurus carolinensis)
• Grey squirrels have grey fur, small ear tuffs and sit with their large bushy tail arched over the back.
• They are approximately 25cms long from head to body and their tail is approximately 22cms long
• They weigh 400-600g.
• They are active during the day

• They feed on a wide range of foods from nuts to fungi, bird nests to nestlings.
• They have two breeding seasons in the year the first is between February to March and the second is from June to July.
• Litters average 3 – 4 young.
• They are most active in the autumn

Prevention & Control.

• Squirrel proof roof spaces by blocking gaps and entrances
• Individual mature trees can be protected with a metal sleeve. This method should be used on trees that are not likely to expand in diameter.

• Killing squirrels will only provide short-term solution, as the area is likely to be quickly reinvaded.