In reply to kipper12:
As last I heard, The Dallam Estate, the landowner, want to restrict access for climbing to the section around the steps. They don't want to negotiate on this position with the BMC and therefore I believe the BMC's stance at the moment is that there is no access agreement.
In practice, if you keep a low profile and avoid the far lower left area near the pheasant pens (Shucks Lair etc, possibly Axiom buttress?) you are unlikely to have an issue.