What a lovely gesture for GRaham Salisbury to appoint his son as FO for his final match - well done on a fantastic career!
(Final match not confirmed as far as I know, but why else have his son as FO - its the only plausible reason!)
It is certainly a way of getting around the covid restrictions by ensuring that a family member can be present to witness the end of his twenty year career. I don't blame him for that.