Part P has nothing to do with it. The loft conversion was done by a builder.
It will stop builders, who through ignorance thought they were doing no wrong.
Pat-n-Dave, you need your head testing.
Read again, "Ring mains are far 'more' open to abuse".
BTW, his kitchen had all the sockets daisy changed together too, and the under-worktop oven (1kW) was also plugged into this too. He has a major rewire in parts. The kitchen fitters and loft converters all did this, and they were not DIYers.