The only way that would be even slightly acceptable is if he locally fused each lighting circuit and set them up as fused spurs off the ring main and even then it would be weird.
That would indeed be acceptable, but the cable running
to each fused spur would still need to be 2.5 sq. mm, whether the fused connection unit was on the ring or wired as a spur from the ring.
I've used that technique on occasions where an existing ring is already close by and it would be very difficult to tap into a lighting circuit to add a light.
As a matter of interest, what other circuits are present in these premises? Is the 32A MCB in question the only one feeding both the sockets and lights in the shop area? Are there any other dedicated circuits for fryers and such like?
