Did the HRH Alexander Earl of Ulster attend his auntie the Queen’s Christmas festivities at Buckingham Palace the week before Christmas?

Is he one of the more handsome of our Royal dynasty due to his mum being Scandinavian (a Dane, to be precise)? Is the Earl’s place in the line of succession secure now?
Answers

Rico

The Earl of Ulster is not entitled to the HRH

Clo G.-B.

The Earl of Ulster is a peer, not a royal peer and does not use HRH. Did Buckingham Palace release the guest list? No. So we have no idea if Alexander Windsor attended the lunch. The Earl of Ulster remains in the line of succession, but with each birth to a royal who places higher in the line than he, means he will be bumped down.