From NI met police guidelines
Gatherings and mixing of households
Indoors
Households are no longer allowed to mix indoors in private homes unless you’re bubbling with one other household.
You can form a bubble with only one other household. These two households can be any size, however gatherings indoors should be no more than six people. Children aged 12 and under from those two households are not counted in this total.
There are some exemptions, including for those with caring responsibilities and the movement of children between homes when their parents don’t live in the same household - see more about the exceptions.
Outdoors
Up to six people from no more than two households can meet in a private garden, but you should maintain social distancing.
If the gathering is with members of your bubble, then a maximum of 15 people from the two households can meet up outdoors in your garden. Children aged 12 and under from those two households are not counted in this total.
So seems you could meet in a garden which is more than in rest of UK isnt it? Or you could meet for exercise if you live close together