Surely it can't be the Queen on the telephone to an off-licence ordering a bottled gin and a packet of prawn crisps?

Pranks

Astral marriage - Victim works in a psychic's office. The psychic reads the victim's tarot cards, and predicts she will meet a tall, rich man called Oliver. In walks a tall, gawky man called Oliver who is rich, and the psychic persuades the victim to marry him, and hold an astral wedding ceremony in the office
Trifle #3 out-take - Glynn the actor who took part in all the trifle scams is caught out by the third victim who had been instructed to get him covered in trifle
Hot air balloon - Victim has had a lot of trouble with the local hot air balloon club near her home, getting very angry with them for flying over her land. So one day a balloon lands in the middle of her garden
By appointment - victim works in an off licence, which supplies the Royal family. A gang of rogue valets pick up the order, then the victim receives a call saying that the royal van has broken down, and that Princess Margaret will pick up the order herself. Victim has to explain that the order has already been collected