Colin:
Check your grip pressure and keep it very light
Check your grip and make sure you see at least 2 knuckles on left hand when looking down and make sure the right hand is at least facing target-roll the right hand a little under for now to encourage closing the clubface at impact.
Check that you are finishing your backswing, take your time going back and down, you may be rushing the downswing and cutting your backswing short which reduces wrist hinge.
Make sure you are hitting through the shot and not hitting at it.
Make sure your feet are aligned parallel left of the target but not too much left, use a club across your toes to make sure. Its amazing at the range how few people(maybe 1 out of 10) fail to align properly then spend the next hour beating balls for nothing.