As an idea to everyone anyway, we always take some frozen bacon and frozen UK sausages with us anyway (along with Heinz Beans and PG Tips) to slowly defrost over the week. Much as we like the French sausages as a meal in the evenings, they're not quite right for a fry up for breakfast!!
That's why I'm French and your're British
As far I
baked beans, I won't accept to ingerate frozen sausages. There's too many butcheries which will be open to buy some good and FRESH food.
You probably use to go to supermarket in Uk to buy your food but here we mostly use to shop at the corner in our bakery, butchery, cakery, fruit & vegetable seller,...
... so if you still interest in giving your money to local people these guys worth better than big stores.
And you're dependant to pushing your caddy in supermarkets, they're still middle stores such as Marche Plus Rue de Laigné , which would be open !