Didn't P. Charles at one time have a relationship with Lady Sarah Spencer, now Lady Sarah McCorquodale, prior to approaching Diana?
Yes, Prince Charles dated Lady Sarah for some time, and it is during this time he was introduced to a teenage Lady Diana Spencer.
Other British Royals' past girlfriends I am aware of include:
Prince William - Arabella Musgrave (as far am I am aware, she is the only confirmed girlfriend of his)
Prince Andrew - Koo Stark, Catrina Skepper, Aurelia Cecil
Prince Edward - Ruthie Henshall
Viscount Linley - Susannah Constantine (aka 'Trinny and Susannah')
Alonso Guerrero is a literature teacher ,he was Letizia 's 1st husband 1998-1999. They married on August 7 1998 in a civil ceremony but the marriage ended a few months later in 1999. Anyway Alonso is 10 years older than Letizia. He was Leti's former teacher.
Here is a photo of Jan Heissenberg. One of Sophie's boyfriends.(Unsure but I think he is the rat that told of the potting shed) There was also Michael O' Neill, who she returned to Australia with. Sophie also dated the son of Micheal Parkinson.
It will be difficult to give all Edward's girlfriends as he tended to keep his girlfriends as far away from the press as possible. Two that did manage to get into the public view was Georgina May.(1) Edward was said to be very fond of her until the press got too much for her and she left him. I must admit that she was under terrible strain, she was a large size woman and Britain was in the grips of Diana and Sarah. Terrible to think the relationship never stood a chance.
His first relationship that was made public was Romy Adlington (2) a model.
There was other relationships
New Zealander, Alison Bell - later CNN newsreader and fellow drug user with James Hewitt.
Eleanor Weightman, fellow student at Cambrigde.
Gail Greenough, Canadian sportwomen
Ruthie Henshaw, actress
And Ulika Jonsson, the Gladiator girl.
Odd thing is many of these women are still very much friends with Edward and Sophie.
Last photo is Sophie,:) this is how Britain was introduced to the zany blonde, who was flying a kite at Balmoral with Prince Edward. The caption, of the photo reads, Prince Edward with another Blonde.
Claudia Schiffer dated Prince Albert of Monaco, and Elle MacPherson (lucky girl! ) also dated Prince Nikolas of Greece. Also didn't Gwyneth Paltrow date Felipe briefly? In the "older" era Prince Andrew dated Koo Stark and Princess Stephanie dated Rob Lowe.