You're obviously not keeping up!
You can't spread the virus if you're sitting down in a coffee shop, but you can if you sit down in a supermarket.
You can't spread the virus if you work in a supermarket, but if you visit another store during your lunch break you can spread it, unless:
your visit is to a coffee shop AND you're sitting down
your visit is to another branch of the same company you work for AND you still have your uniform or staff badge clearly visible.
If you're on a train you can spread the virus if you're sitting down unless:
you're eating something (masks are not edible)
you're a train guard
you're a BTP officer
you're driving it
If you're a train guard you can't spread the virus if you're standing up unless
you get off the train
You get off the train and enter a coffee shop and don't sit down
you get off the train and onto another one you're not the guard on and don't sit down
you get off the train and onto another one you're not the guard on and sit down but don't eat anything
It's not exhaustive but it's a start