Where can I go to the toilet?!

[PoptartPoptart]

In London?
We are going into central London at the weekend but I am a bit concerned that as all restaurants and bars will be closed there will be nowhere to go to the toilet!
We are going late afternoon/evening so the shops will be shut.
Help!

Thanks to all those who have given some really useful advice and stuck up for me while some were being unnecessarily unhelpful and unkind.
It is much appreciated.

The loos in London Bridge mainline station were open last Saturday op (and we’re free). But I’d imagine it’s the same at the other mainline stations.

*were

Have a safe and creative trip. I often find cafes etc will let you in for a wee if you say it's a medical condition. Even if just open for take way. Or just treat yourself to a drink although that is a bit self fulfilling. The toilets at Green Park tube were open recently but shops in tier 3 are open and I popped in some.
Ignore all the horrid people on here

Mea culpa - drove through central London this morning and most shops were indeed open.

I'm really confused though - what the hell is the difference between Tiers 2 and 3!?

I think many shops have reopened public toilets due to pressure from charities such as Crohn’s and Colitis UK. I understand your worry as I have Crohn’s so suffer the same stress all the time, I got caught short in B&Q a few months ago which was super embarrassing so hope you don’t have the same problem.

Hope he gets some good shots OP. DD1 is also doing GCSE Photography. DD2 made the mistake of volunteering to pose for some photos needed for homework. 2 hours sat on a brick wall in a park in the cold. Then on the way home I dropped the camera getting out of the car. Olympus OM-Ds do not bounce.

Oh no @FireUnderpants! I can imagine the horror of dropping the camera.. I hope it wasn’t completely broken?
DS is an only (well he has stepbrothers but they live quite far away) so usually I am called upon to be his ‘model’. I’ve spent many a weekend in weird and wonderful locations. The most memorable was when he was doing ‘levitation’ shots and I had to balance on a rickety old bench in the freezing cold for about an hour while he tried to get the settings on his camera just right
At least these latest shots are just scenic