Got my good lady's saxo done at Advanced Auto Tint in glasgow, excellent job and did not remove any windows.
They said the new law is that you can go as dark as you like on rear passenger windows and rear screen, but NO tint at all is allowed on the front driver & passenger windows.
However they put a very light tint in the front for me and said at worst the cops would tell me to remove it, but any darker on the front and it is 3 points and 60 quid!!!
All i can say is there is a lot of cars out there breaking the law.