Giles Coren posted a tweet about it. Interestingly it was just after he attended a social gathering in Amsterdam also attended by Harry and Meghan. He later deleted it saying it was a joke.
I’ve always thought people only believed it because the name Giles sounds posh to Americans so if a posh person is saying it it must be true. If a Kyle Jones had tweeted it would people have taken it with such truth? & it’s not like Giles credentials as a food critic mean he would be privy to such private information.