Any spying on citizens in the UK is universal - the component countries do not make a difference to that in any way. CCTV, number plate cameras etc. are all present and operate universal surveillance throughout the UK. Nowhere is there any sizeable objection to it - especially since "only people with something to hide would object to the monitoring".
UK residents would do well to heed the words of Benjamin Franklin :
"They who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety"
Perhaps we would all benefit from remembering the US Founding Fathers who had railed against the rot of the UK by 1776 - it is amazing how much resonance their words have today and how much their meaning has been lost even to Americans who should know better.