When Prince Philip bring Charles to his new school, they proceed to take a photograph. You can see the prince's hands start from behind his back to the front, then back to front again.
When Phillip is attempting to attach the heavy iron gates to the concrete block wall he has built without assistance, a series of quick cuts between inside and outside the gates show the gate he is holding flip back and forth abruptly from horizontal to vertical though he is visibly straining to lift it.
The Junkers JU-52 depicted as the airliner that crashed bears Luftwaffe colors, when in fact the aircraft (Registration OO-AUB) should be wearing the markings of the Belgian civil airline SABENA.
Cement isn't mixed or worked with in the rain. It will cause the cement to be weak and crumble.
Philip and Charles arrive at the Airport to fly to Gordonstoun in a 1950's Lagonda DHC which is accurate as Philip had one built in 1954.
They then fly to Gordonstoun (assume from an airfield near Windsor). They are then shown arriving at Gordonstoun in the same car.
So the premise is that whilst they fly to RAF Lossiemouth (at a guess) someone has driven the Lagonda to meet them so they can use the same car. According to google that is a minimum 15 hour drive (avoiding motorways) and realistically 20 hours plus an overnight stop.
When Charles arrives at Gordonstoun, a pupil addresses him as Your Royal Highness, but is told to call him Charles. Schoolboys at that time were never addressed by their first names either by their teachers (who addressed them by their surnames) or their schoolfellows (who addressed them by their surnames or their nicknames). First names were entirely absent in boys' schools at that time, and many schoolboys would not even have known their friends' first names. Charles would have been referred to by both staff and pupils as Windsor.