In reply to Violinist:
In the same vein as mam tor, but more serious:
"Breakaway 500 feet Hard Extremely Severe (7.7.79)
Conveniently situated near the graveyard of Morwenstowe Church, Henna is the highest precipice on the Culm Coast, and the most frightening. The only route up the main cliff might well be available when other cliffs hereabouts become overcrowded... A huge boulder lies ominously beneath the central faultline. Terrordactyls, ice screws, stakes and a strong belief in one's immortality are the main requirements for an ascent.
A serious and committing route. After pitch 2 retreat would be at best extremely difficult or at worst terminally easy. The climb takes the central fault line gained from the left. All the equipment mentioned in the introduction is essential."