In message , Rob Horton
wrote

Surely this is wrong. As I understand it, ordinary people can still do
any sort of electrical work so long as they submit plans, get them
approved and get it inspected.

IMO it is wrong to suppress information on the correct fitting of
electrical and gas items.

Despite legislation, untrained and incompetent people are still going
to attempt to fit gas and electrical appliances themselves. If no
instructions are given then there is greater chance that the item is
going to be fitted incorrectly and/or dangerously.

--
Alan