Hop Locker, Waterloo, SE1
There's been a pop-up bar here since at least 2013, and in 2017 it was taken over by the lovely people at Hop Locker (also based around the back of RFH in the food market). It returned in a different format in summer 2018, albeit unbranded (but run by the same people).
Address: Queens Walk (under Hungerford Bridge), Belvedere Road.
Former Name(s): Look Mum No Hands! (on the same site).