Tricky Dicky wrote:

I think the switches Roger was referring to are called tumbler switches,
see below;

https://m.rapidonline.com/Education-Switches

A warning though these are strictly low voltage and if there is any risk
of mains voltage appearing on these then use something else.

Richard

That's them, thanks! I should have thought ot Rapid. But I note they
are apparently obsolescent. and they are not going to restock them.

--

Roger Hayter