Could it be the top of Birthday Pot?Magic Roundabout is a fine trip (in the right conditions).
Try this. One little clue - it's in Notts Pot. Precise location, please.
On the current topo it shows you can use a bolt deviation to avoid this bit. Is it a better option? - because this is awkward whatever angle you come at it.
Well done. Your turn.Rumbling Hole?