I'm shielded. My mum lives alone. If we formed a bubble when allowed to do so would my mum be able to see other people as long as she keeps to social distancing with them? For example, could my been-everywhere-she-can-mixing-with-all-and-sundry sibling visit mum in her garden? Mum isn't keen to form a bubble if it means she can't see the rest of the family. I'm not sure how it all works hence asking here. Thanks 