I worked in a record shop from 1972 to 1978 and so i should know this but it ain;t registering, what waqs Mick Ronsons band was that Iggy Pop? Moyy The Hoople were pretty cult ish
Deep Purple could be the answer. Various members went on to form, or be part of; Gillan,Rainbow,Whitesnake,Black Sabbath,KLF and numerous other groups.
I think the following members of Cockney Rebel played on these UK #1 singles which may be the right answer.
Duncan Mackay played on 'Dreadlock Holiday' by 10cc.
Stuart Eliott (& Duncan Mackay) played on 'Wuthering Heights' by Kate Bush.
Jim Cregan played on 'Da Ya Think I'm Sexy?' by Rod Stewart.
Thanks to everyone that replied to my question, thought you might like to know the answer which i've just got back. Big in Japan. Bill Drummond (KLF), Ian Broudie (Lightning Seeds), and Holly Johnson (Frankie GTH). I've never heard of the group myself.