On the Gvt website, the only bubble mentioned is the original one for a single person with another household. From July 4th, two households of any size can meet together indoors or outdoors, at home, in pubs or go on holiday, but must socially distant. This is not exclusive as each household can meet up with another household at a different time. So grandparents could see one adult child with grandchildren one day and a different household another day.
Outside up to six people of different household can meet with social distancing. In restaurants, only two households can eat, no large groups of single people.
Confusing but quite clear on the Gvt website - not that all the people at the beach, street parties or outside Anfield took any notice yesterday!