Yes and right or wrong they the police can and do enforce it when they are bored or have a hate of bikes. they can also do you for riding one handed,( bit of a bitch for motorcycle couriers operating 2 way radios on the move, oophs who me, never did that
unless you are doing hand signals, turn signal or stop, not one fingered or two fingered gestures
With the new fatigue laws they are looking to introduce, they have you cold, they will say you are showing signs of fatigue, even if you are just stretching, they will insist that you stop, revive, survive.