Yes, a few sets adopted the PP10: Roberts' RT7 and RT8, I think some early Thorn transistor table models with FM, and HMV made a big portable (the 2104) which had a reversible connector, PP10 pins on one side and PP9 snaps on the other to give the owner a choice of which to use.
I can't think of any set other than Roberts' RT1 which used the PP8, but it was a popular model so the battery stayed in production for quite a while. Two of them were used in an optional docking station for Murphy's first transistor portable, though.
Only a little Hong Kong-made Aero set here takes a PP5, I'd guess that must be the model you've seen. I think an early Sinclair, the Slimline, did too. Not much of a market, and the battery must soon have vanished from the shelves.
PP1 and PP8 were both 6 volt, PP11 4.5 + 4.5 volt - really a PP9 but wired in two halves to a four-pin socket.