I really believe that if the restrictions are only social (no more than 6 people, no mixing of households inside,...) people won't comply.
If you are being told to take a packed train or tube to go to work and there mix with your colleagues, will you really not see friends or family at the weekend?
If you see people going to the pub down the road every evening, will you really refrain from inviting a couple over to yours for dinner?
Basically, if you can afford to pay you can socialize, otherwise you can't.