Union Jack
This is very sad I know but according to AP1358 chapter 9
.... an air aide-de-camp may, on relinquishing the appointment continue to wear the small size Royal Cypher of each Sovereign under whom he has served and been appointed. The Royal Cypher of the reigning Sovereign is to be worn above any other Royal Cypher. With the exception of personal and air aides-decamp, Royal Cyphers are not worn after the appointment is relinquished
I assume with the Royal Cypher go the Aiguillettes.
And as a strange co-incidence the officer modelling how to wear such Aiguillettes in the AP features in the second photo down in Heliports post below.
Good to see some fine medal racks as well! Even from the non-RW/ME fleets!