[golfbulldog]

Try this.
Put both hands in front of you as if you were addressing a ball but with no club.
With palms together ,cock the left wrist.
Make your backswing to the top .Notice how the turning of the right arm enables the right wrist to remain bent and level-and it now matches the cocked left wrist.

I agree with Neil , I think.

The left wrist bends in concert with the right elbow. For the right wrist not to cock as this occurs then i think that the right forearm has to rotate ( supinate) in a counter-clockwise direction ( from your personal viewing position)

This seems to allow the left wrist to cock, roght elbow to bend and keep the right wrist level but bent.

The timing of this right forearm rotation can vary but it is needed at some stage. When performed early in the swing it is essentially the movement Dante recommends in his book , and is one of the moves in Manzella Twistaway.