Diagnosis
The majority of faults are in the setup:

• is the clubface pointing left (closed)
• is the ball too far back in the stance
• is the body/feet aligned too far right of the target line
• is the grip too strong (too far to the right of the grip) (see photo)
• are the feet too wide apart
• is the ball too far away from the body

Other faults are in the swing

• is the club swinging too far around the body (too flat) (see illustration - incorrect shaded red)
• is there a feeling of an excessive hit with the right hand at impact