Quick update from the front line as I am in Sheff this weekend for a family do.
Having had
far too much to drink last night, I went out earlier to clear my head, and happened to walk past the alleyway where "Summer Relax" is based.
I saw a couple of Chinese ladies outside the shop looking rather upset so I asked them what's up (for you sceptical Southerners, this is actually quite normal behaviour in the North - "mind your own business" is almost a foreign expression up here

).
They said the police had been in and had now sealed the shop and taken the keys away with them, so the ladies couldn't work today and didn't know when they'd get back in. They were mightily pissed off

My guess is that detectives will be seizing all devices, booking info and CCTV. They could potentially use this info to collar a client or two...
Anyhow, the authorities are clearly putting some effort in on this investigation, so if in South Yorkshire, celibacy is probably the best policy