BBC website is dead end did that weeks ago, have tried the company listed but no reply yet, and following the A470 on a map doesn't work either, i have all the OS maps for that region and its not on there anymore.
I'm going to try a library to see if they have any early maps of the area around blaenau ffestiniog see if i can locate it that way... i want to be sure where it is before i go up as its a bit of a trog