Mr Morton has recently released a book about Meghan Markle but was speaking at The Oldie Literary Lunch to promote his book on American socialite Wallis Simpson, who later married Prince Edward to become the Duchess of Windsor.
The 65-year-old told the shocked audience at Simpson's In The Strand: "I'm sorry I can't go on". Later, Andrew updated his fans on his health via Twitter, writing: "Thank you for all your good wishes - seems that I had a mini stroke, but am doing well & on the mend". A third asked: "Will you be recovered by the royal wedding?"
Facebook Suspends 200 Apps in Investigation Over Data Abuse
Where Facebook finds evidence that these or other apps did misuse data, it will ban them and notify people via this website. In the future, the portal will be updated with information for other apps that could be found guilty of the same charges.
Andrew was later due to give a talk at Waterstones on the Kings Road.
Mr Morton was scheduled to appear at another event at a bookshop in West London this evening, but this has now been cancelled. Sadly, we were left with no other option - please accept our sincerest apologies.
Cavaliers coach Tyronn Lue contemplating starting Tristan Thompson for Game 2
But don't expect Celtics coach Brad Stevens to fall for the potential smokescreen that is Thompson's starting presence. He's at the forefront of that. "We're very flexible, and we'll change it if we feel like we need it".
Andrew Morton, the man famous for Diana's secret tapes, has suffered a suspected stroke while on stage during a book signing event in London. It also revealed that Meghan had gone to the same nursery school as Scarlett Johansson, at LA's Little Red School House.
WWE Raw: Two Money in the Bank qualifiers announced
Will Roman Reigns get retribution against Jinder Mahal? There will be 2 more Superstars from each brand added to the match. Backstage segment with " The B Team " Bo Dallas and Curtis Axel approaching Kurt Angle for a RAW Tag Team Title shot.