Thanks James. Cathay says on their website that the certificate is not required for transiting passengers. I was just trying to get first hand confirmation of this.
Does anyone have any up to date information whether this health certificate is required if you're only transiting through Hong Kong (from the US to Phuket on a UK passport with a valid retirement EOS)
The bank book isn't enough? What does the letter have to say? And both have to be dated the exact day I go for an extension? So impossible to go to immigration when they open then. They really are doing everything they can to make it complicated.