Sadly my view on squirrels changed when some got into the loft of a previous house I lived in.
Fortunately I found out before they had done any serious damage, or killed themselves!
My going up into the loft and shining a bright light at them was enough to persuade them to leave, I then partially blocked the gaps, and more importantly cut back the tree branches which went close to the house.
Once they were clear I had a better look - lighting cables had been chewed through to copper in several places, fortunately the relevant lights were off, so the cables were not live, and I was able to easily replace them, and the soiled insulation they had started to nest in!
They seem a whole lot less cute after that (these were, of course, grey squirrels; red squirrels are still cute