If the EU approves the “request” for the delay it will set a precedent of ignoring the request from a PM of a member Nation opting to side with a request from the vote count of the Parliament which is acting AGAINST the will of the PEOPLE that parliament is supposed to represent.
Get a big bowl of popcorn for this one.
Remember, in the UK it is parliament who is sovereign, not the people.
The former letter requesting an extension is from the office of prime minister and has that weight.
The latter is a personal letter.
And the simplest response will be “I beg your pardon, did you forget to sign it? If you want to, sign it, send it back signed.”
Boris is playing political Kabul to squirm out of his statement that he wouldn’t ask for another extension.
But, second letter notwithstanding, boris DID just ask for a third extension.