I know from an annotated 'Poucher' guidebook I first went up in 1972, but several subsequent visits both up and down.
...from Glyder Fach. One of the more enjoyable down scrambles I've done. I tore my trousers on the rock slide and had a little sleep on the plateau. Cracking view
Very easy scramble, quite short too..
A beautiful part of the world.
Done in winter conditions in April/very unusual/,descended couple of times in summer.
Done in summer and in winter. My advice is to do it in winter, it's much more exciting.