The thing is, although there is alot of countryside in britain, in terms of population per squre mile, with every citizen spaced out evenly accross the land, there is still around 255 people per square mile in the uk, therefore you would never be clearly away from potential danger.
Compare this with the likes of canada that has an average of about 3 people per square mile, i think it could pose a serious problem.
"Bugging in" is obviously an alterative choice, but other than waste disposal issues and potential house raids to find food etc etc etc, is this only really a temperary solution?
Wouldnt it be great to have the land and natural food available (in terms of meat especially) that canada does.