In reply to ChrisBrooke:
Looking at your logbook, you don't seem to have a lot (if any) trad experience, unless you have an experienced partner, I'd stick to single pitch and start with easier routes if I were you. That makes
Sennen your best bet.
Bosigran is great, with no access problems, but is mainly multipitch.
Chair Ladder is really the best crag for grades up to E1, but you have to be very confident with the commitment of an abseil aproach (it is possible to scramble in at low tide but...) and trad multi-pitch.