While investigating Shifty for blackmail, the agency focuses heavily on Shifty’s Boss (or “SB”) to try to learn what exactly Shifty could have on him. SB is described as a “rotund” man with  “a bald patch like a monk’s tonsure.”¹ 

They soon discover that SB is making frequent visits to a blonde woman in Stoke Newington, but are unaware as to what goes on inside the home.²

“‘Barclay thinks it might be a rubber fetish.’

‘He’d need a lot of talcum powder to wriggle himself into anything made of rubber, the size of that belly.’” ³

^{1, 2: Troubled Blood, Chapter 25
3: Troubled Blood, Chapter 52}