Blueyonder (now VirginMedia) cable IP addresses query

If I stick an IP address of theirs into dnsstuff.com, it says it's in "United Kingdom [City: London, England]", but the name of the machine is [ip address].cable.ubr02.shef.blueyonder.co.uk

Does their naming scheme mean it's someone actually in Sheffield? There's what would be a staggering coincidence / evidence who's being naughty with something if so.