Its really simple.
One household can go for a walk with a bubble, and one other person, not from the same house, but the dog can go too, but no running, or hopping, and no stopping at the shop, and ignore your neighbours if you meet them outside, or Plod will read the riot act and cuff you, and if you're black, beat you, and fine you lots of squid, and kids are super spreaders, but immune from arrest, but must bubble with their mates, but not visit granny or public toilets, or wear each others clothes, a d dont eat out of the same chippy in case too many Chinese in there, and wash your feet if you have walked in dog poo and wash your cans of lager in case they have the dreaded Lergi on them, and brain viruses that keyboard, bubbles and households, distancing, who am I where am I have I got a temperature?
And another thing, thing, thing ting tin ti t ...........