Allthumbs wrote:
A lighting 3 pin transformer has failed and Googling "TN20UK" got me a
Google thwap (or whatever its called) - one result - but not it.

Its marked 240V 50 Hz
12v 1.67A-20VA

maker looks like TECNE TN20UK

Google shows me lots of things that are not it, I'm guessing somebody
here (he hopes) can point me to it?
Any 12v 20watt lighting transformer should do but if you are running
dimmer, make sure it is a dimmable one.

Toolstation, screwfix etc will have them.

Bob