“The Royal Wedding from Hell” is a work of fiction. Names, characters, places and incidents either are the product of the author’s imagination or are used entirely fictitiously.
Let me stress (with some examples):
John Key, the Prime Minister of New Zealand has not become a demonic beast, hungry only for fresh flesh,
The Queen does not have a vault full of arcane magical artefacts beneath Buckingham Palace
The Duchess of Cambridge (nee Kate Middleton) does not speak like some slapper from Leeds.