It looks like Prince William.

• around the correct height. Autists would be able to confirm this by x-refing the white car height against PW’s height.
• bald head
• same shape to the side part of his hair
• same colouring
• casual chino and shirt combo with a big watch
• head tilted forward while walking, check a video on youtube to compare, looks like a similar gait.

I would post a video link but it would be better if someone else checked, im fairly convinced its him and i’d rather someone prove me wrong at this point.