I parked in Bloomsbury square car park and booked from 06:00-22:00 which was £10. It’s a really good secure one, I found it on the just park website. I can’t tell you exactly where it is as my dad dropped me and my mum at Fitzroy and then brought the car back round after but he said it wasn’t far at all, a barrier let’s you in and all you need to do is type in your booking reference for the barrier to let you out, pretty sure 24hr park was available on there xx