When squirrels find a place to nest, this becomes their ‘territory’, potentially in your loft or roof space and they will protect their territory at all costs. Especially when they have young in the nest. This means they can become very agitated and even aggressive when disturbed. There is a common mis-conception that if the animal’s entry hole is blocked this will remove the problem.
It is not advisable to block entry holes as the adults can no longer reach their nest, and often their young. This will do the opposite of deterring them, encouraging an attack on any blocking work and if unsuccessful they will often attack fascia boards until they are successful
As a pest it is illegal for pest controllers to catch and release grey squirrels, they have to be dispatched. We use the most humane methods to remove all pest problems including squirrel infestations.