Well this did make me
smile 
and that's quite a feat on the BBC news these days...the folk in Wales may not be quite as amused..
We use the Railway Inn in Nantgaredig for our noggin. Side road just off th3 A40 towards Llandovery from Carmarthen.
Not far away is the A4069 Black Mountain road. It was a popular road for drives! It now has a 40 limit with average speed cameras. It's still popular though. Last year we were up there in the Morgan. Passed some cyclists on the way up from Brynamman, got stuck behind a slow car the Llangadog side headed down and the cyclists caught up with us.
There used to be a lot of rallying in the area but these days only non competitive runs.
As for Carmarthenshire in general the cojncil have been more prone to 20 limits than surrounding councils ( Pembrokeshire, Cardiganshire, Powys). It seems there is no clear criteria so individual councils make their own decisions. Similar roads are treated differently.
The Sennedd are pushing decisions back to the councils, washing their hands of it.