[CambridgeWorks]

Ron Diggins and his Digola. A sort of mobile "disco" transported around in an old VW Caravette IIRC. I remember he provided entertaiment at a "do" we went to in the early 70s. Established before then though.
G4DDI, Colin Guy of VMARS used to work for Mellors afaik.
Grimjosef. I just looked at the Pye ad in your newspaper link. The advert above it of the Cheavins filter. We have one, minus domed top and tap. Used as a garden ornament. Came from my wife's gran who lived about 25 miles from Boston.
Rob