Recently stopped by at Charlescombe having been at Portishead quarry earlier in the day.
It is very tidal, when we got there the water was lapping the first bolts. The approach is easy enough, about 5 mins from the road to the coastal footpath and then a hundred metres or so of slippery scrambling along the coastline.
Can't really comment on the quality as we didn't climb but it looks ok for a summer evening's jaunt. Steep and pocketed, a bit like a (very) poor man's Cheedale. I expect you would want to hit low tide on a sunny/windy day in order for the bottom of the crag to dry out. The base will be very muddy so take wellies / tarp.
Apparently the 8a is more like 7c. Don't have a topo, best info I could find was on the ukc logbook page.
I'm intending to give it another try later in the year so will report back!