I believe the VAR Official has made a glaring error there! He has assumed that the defender can only play the attacker offside with a part of the body that can play the ball! The ATTACKER can only be deemed OFFSIDE by a part of the body that can legally play the ball, but surely ANY PART OF THE DEFENDERS BODY can play the attacker ONSIDE, NO?!
Or, is offside now only BOTH PLAYERS measured from a body part that can play the ball. If so, THATS BOLLOCKS!!!
Yep, it's the latter mate.
I think Zouma's arse is playing him on in that image anyway.