In message , ARW
writes

You would hope the 3A fuse blows if the cover becomes live. If not then
you are relying on the RCD to protect you.

I have seen plenty of installations where the cooker hood power is
behind the hood with no other means of isolation. It is not something I
would install that way.

As to if it complies with the regs I am not sure. I would say not best
practice but not dangerous.

Great advice Adam. Thank you.
--
Graeme