In reply to Papillon:
There have been a lot of developments in Dorset since the 2005 guide with whole new venues developed mostly in the lower grades plus there are more trad routes/venues included in the 2012 guide. However, the 2012 guide doesn't include any bouldering at all but I believe a separate bouldering guide is in production which will include developments around St Aldhelms head and lulworth etc
If you only had the 2005 guide and went to Dorset you'd still have a lifetimes worth of climbing objectives.