Many thanks for all the useful advice. I played 18 holes on Saturday and went round in 103 - my best ever. Sunday saw me at the driving range where I developed a drill that really improved my swing and strike.
I started with a 3 iron and the ball placed further back opposite back foot and just chipped a few balls into a 10 yard net, gradually I brought the ball further forward and increased my swing until the ball was much further forward and I was using a full swing at 100% power. At this point the balls were sailing straight down the range and further than I had hit before. I used this drill with all my clubs including the driver (I was even chipping more accurately with my driver than I could with my 9 iron).
I'm not sure if this drill will work for anyone else but it seems to have worked for me.
Once again, thanks for the great advice it all seems to have helped.
Robin.