I don't think UK airspace is an issue, and is a lot more open than much European airspace.
I think in N Europe perhaps only France could be considered better, but they don't allow IMC flight in their widespread Class E, and the place is covered in prohibited areas which work by day/time and in some places can be a b*gger to pick one's way through when VFR planning.
In aviation, accurate navigation is essential, just to find some grass airfield which may not be visible until 2 miles away. So avoiding CAS does not require additional techniques.
However, you do have to navigate using modern means - a decent GPS. The methods currently taught in the PPL are inadequate for all but the most regular local bimbles, sticking to well known well rehearsed routes.