After twenty years of being thwarted, I finally got to the Pen-y-Fan summit this morning (pictured). Dry weather plus not much wind did it. The other picture is of a neighbouring peak, Cribyn, from the summit of Pen-y-Fan.
In retrospect, the difficult part of the climb is the last couple of hundred yards which are steep and rather exposed and where the path seems to vanish into rocks promising worse.
In fact, another six feet up and you attain the summit of Corn Du and all the hard work is done. So I was six vertical feet short of summiting yesterday when I turned back. Still the top at Corn Du is as flat as a helipad, so in yesterday's blustery conditions to proceed would have been to self-launch: no regrets.