The grey Squirrel can nest in your wall cavities, between false walls and in the loft, The squirrel may use roof insulation for nesting materials and may chew boxes and other items stored in the roof space, in some instances they have been known to chew electric cables and roof joists causing a potentially hazardous condition, at the same time causing the problem of noise. The Grey squirrel is prevalent and is not protected in the UK. 
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