On Saturday, 7 November 2020 12:51:49 UTC, Jedzi wrote:
I messaged an online plumbing store and they recommended a conversion
kit: https://bit.ly/366v5Kk Unfortunately it came with no instructions
and I can't find anything useful on the web. I've spent ages looking
at it, but can't see how to fit it. https://shorturl.at/hDMX8

Also called a tap reviver.

Video at
https://www.youtube.com/watch?v=Xvik57gmEDI

Basically, *turn off the water*, take the old handle off, unscrew the tap innards from the tap, and screw in the new innards. Put the new head on top.

Owain