One of Diana's friends makes use of the term 'ringtone', which did not exist at the time.
Wedding rehearsal. The exterior is St-Pauls Cathedral, you see Charles entering. The interior however is a gothic church, a completely different architectural style than St-Paul's.
Lady Diana Spencer is dancing to the song "Edge of Seventeen" by Stevie Nicks shortly before her engagement was announced on February 24, 1981, but the song wasn't released until July that year on Nicks' album 'Bella Donna'.
It is absurd to portray Diana as being awkward around Royalty and not knowing who to curtsy to and in what order, etc. Her father was an Earl.