Thanks, appreciate your help.
I've failed to understand for a long time why the face gets so shut in the takeaway despite having what I considered a neutral grip, definitely not strong. My wrist naturally wanted to twist it closed immediately and when I've tested it now it seems to be from gripping the club too upright and it sitting towards the palm. If i lift the club horizontal, grip in the fingers, wrap the heel pad towards the clubhead, this creates a much different feeling and a club which sits more more on the heel at address rather than on the toe. I remember seeing a video saying you should be able to get a coin under the toe of the club at address.
With the club held like that I no longer have the sensation of wanting to turn the club closed as i take the club away. This was a nightmare move with the driver as the face then ends up shut throughout the swing and results in the low pull hook.
With the trail hand, how close to the tips of the fingers do you hold it?