On Fri, 17 Mar 2017 16:55:19 +0000, John Rumm wrote:

there is a more general danger with cascaded extension leads that the
earth loop impedance can rise too much, and then in the event of a fault
(say crushing a flex under a chair leg), the fault may not be cleared
fast enough to prevent something getting too hot and catching fire.
Having said that, with short leads that's unlikely.

Surely that is what the 13A plug fuse is for?
2.5 Ohms max ZS for a 13A fuse, almost double the requirement for a 32A
circuit.