John G. Perry in Quantum Jump 3 LPs

The band existed in the late seventies (1976 to 1979) and made 3 albums though the last one is just remixed tracks from the first 2. Discogged thus:

Rupert Hine was a producer and keyboard player in the early and mid-1970s before he formed this jazz rock fusion band. Working with some of his regular studio session musicians like bassist/vocalist John G. Perry, and Simon Jeffes with whom he had collaborated on string arrangements since Hine's first solo album in 1971, Pick Up A Bone. Jeffes formed Penguin Cafe Orchestra, but continued to collaborate on the Quantum Jump albums.

Some time after the 'Barracuda' line-up had disbanded, Denny McCaffrey (percussion) was rehearsing with a new line up of Quantum Jump, including: Big Jim Sullivan (guitarist with Tom Jones), Geoffrey Richardson (Caravan), Trevor Morais (The Peddlars) and Alan Spenner (Kokomo), when Kenny Everett’s TV show took-off, on which 'The Lone Ranger' was the theme. It was hastily re-released and entered the chart on 2nd June 1979, rising to no.5 and staying on the chart for a total of 10 weeks. The original Quantum Jump reformed, and the newly recruited musicians were no longer required.

In style we're talking light fusion with not much progressive composition, but still enjoyable, I guess.

I think the more formed or composed track Something at the Bottom of the Sea is surely the highlight of the first album, it starts like this:

Incidentally the mastermind behind this band Rupert made two ssw style albums earlier in the 1970s which I personally thought were terrible for the most part, with songs that are all over the place, some acoustic with strings or quartet like Nick Drake, some uptempo with bouncy piano backing like Moogy Klingman, but lacking in much of a spark, and at times very badly sung too in that effete British style that was so common back in the day I guess based on theatrical music hall borrowings.  The whole is similar to Mike Maran posted here or Murray Head.  It's a surprise because in general Quantum Jump is pretty enjoyable.