If this actually happens, there will be anarchy in London. I suggest you double up with elderly family members as it probably will be dangerous to go outside and bad things might happen to aged widows who can't cook and take care of things especially if there are break ins. Desperate people presume you have food even if you have nothing.

Medicines could run out. How will you manage without your regular medications? Do you really want your husband to leave and go check on his mom and leave you alone with kids and be scared?