Combatting the "block" shot

I would be interested in tips/drills to help promote more fore-arm rotation pre/post-impact to help combat a dreaded "block" shot ive been getting with particularly my driver of late. Its getting extremely frustrating!!

I've started swinging (at a consistant tempo to my normal swing) a long iron infront/horizontal to the ground to try and get the feel/action that I'm looking for when swinging normally. When I then take a normal practice swing it feels good but with the ball I loose the feel!

Gareth. Take your normal stance with a longish club... 6 or 5 is perfect.

Stand upright with the club horizontal to the ground. Now make a swing with the shaft remaining horizontal at all times.

In order to do that you will need to rotate your shoulders and arms correctly or the club will dip below the correct level.