The HMV 4000p turntable is a dead ringer for an old ADC 1500. Compare Google images of both.
The electronics could have been made by anyone at the time (like Rotel did for Rank for a time). All a bit 'generic' 1970s rack-system. You can probably guarantee that none of it was actually made by HMV.
Unusually (for typical 'rack' tuners of the era) the HMV 4000t seems - from the better pics on google - to have FM, MW, LW and Short wave. (Nice illuminated tuning scale and meters. The whole system seems to offer a lot of 'play value' with a control and and a meter - or a light - for everything.)
Any speakers?
Any photographs?