The late Laurie Joseph (professionally known as Laurie Jay) was fairly well-known on the London scene in the early 1960s and later.
His own group was The Laurie Jay Combo and they once had a season's spot on one of Associated-Rediffusion's childrens' magazine programmes. Probably not "Lucky Dip" or "Tuesday Rendezvous" (which featured Bert Weedon), but the Combo was featured on one song per show. I remember that the bassist had a distinctive instrument I was later able to identify as a Gibson EB-0 (making the period late 1962 or early 1963). They made several singles for EMI, though I'm not aware of any success for them.
As well as that, I have an idea that Laurie also had a role as a musical consultant for A-R (as, of course, did the rather better-known musician, arranger, conductor and critic, Steve Race). Steve famously hated rock and pop music. There was probably a consultancy gap to be filled there.
See:
https://www.thezoots.com/lauriejaytribute/