Unfortunately some UK airlines have quite cynically interpreteted these new rules in such a way as to allow use of jumpseats to position their staff from A to B, yet impose a total bar on relatives.
The effect of this is that someone I have never met in my life can appear at the gate with an ID and tatty photocopy of an authorisation form and it it supposedly safe for them to fly on the jumpseat -yet to take my spouse or brother risks a terrorist attack.