I live reasonably close to it, didn’t realise people are in there! I’d love to see what a satellite decoder at one of these places look like.
I don't think it will be permanently manned, as in there aren't people who work there every day in it's day to day running.
However being a big site there will be people on site often, either doing projects or maintenance, and also as a base for Arqiva engineers who are I the area. Sutton Coldfield which is a bigger station no one works there permanently but there's an office area which is all hot desks for when people do.
With DSO, then local TV and Com 7 and 8,now 700 clearance I imagine the main transmitter sites have had people working in them most of the time
I'm not sure smoke affects satellite reception, the particles aren't as close together