On Fri, 6 Dec 2019 10:21:46 +0000, Andy Burns wrote:

any electrical connection seems to suffer from this if there are
multiple wires in a hole

An argument in favour of Wago connectors, with a hole per wire.

I though wago and similar spring connectors were stricly 1 wire per
hole. That fact that the larger sizes can accept more than one
smaller wire was improper use. You might get away with two wires but
three or more is asking for trouble.

--
Cheers
Dave.