Sorry about the delayed response.
The bank's address is: Nationwide, 48a High Road, Kilburn NW6 4HJ.
I was there to make a deposit. There wasn't even a queue, but the machine just took a weirdly long while to process a not-that-big amount (about minute and a half too long, as I saw the CEO by the car as I was jogging back - I also just noticed the photos show the lights flashing as I was unlocking the car to signal to the CEO that I was back).
I just seriously struggled to find a free payable bay.
There was actually Tesla at the top of the road on double yellows and I did think to myself "I bet they get away with it and I don't" as I went into the bank. Turns out they did (no ticket on them as I came back).
Anyway, the PCN does look in order to my untrained eye so I may just have to cough up.