On 2021-01-11, Andy Burns wrote:

GB wrote:

I can find some "Socket Converters 2 Gang to 4 Gang", but none from a
brand that I am familiar with.

Does Eterna qualify?

https://www.eterna-lighting.co.uk/product/convert4

It's nice of them to show you what the fittings on the back look like
before you order it.