That's just your browser speculating on why it's had no result at all returned.
From my route tracing experiments it's hosted at UKFast's Manchester data centre. Even if it was crazy busy I'd expect it to respond to a ping or two, depending on whether ping responses have been disabled or not. It doesn't seem to have been disabled on anything else I know is hosted with UKFast, and that includes all the network gear my traceroute showed up.
No ping responses seemingly means physically turned off in this case.
In other news - don't host anything with UKFast.