No, honestly mate. It's from Pyramid by the Alan Parsons Project. I used to have the vinyl and I could never play it without getting an image in my mind of that banded legged frog leaping across the screen in slow motion on the promo. Cant remember the track title but I'm pretty sure it was one of the first 3.(Side 1 on the vinyl)
Don't know Edward Williams though. Maybe he wrote the music that was actually used in the series?
