The land in Southwark that houses Borough Market has served this purpose as far back as the 12th century. The present structures that make up the wholesale and retail market were constructed in the 1851 in the Art Deco style.
From episode 1x09 "London".
From episode 1x01 "Thou Shalt Not Kill".
From episode 8x08 "Repeat to Fade".
From episode 1x10 "8:00 p.m.-9:00 p.m.".
From episode 2x04.
From episode 1x03.
Monica tags along while Gestalt coordinates the capture of the rogue EVA but Nazim manages escape after a police officer gets too close in episode 1x04 "Chapter 4".