The above joke was posted (predictably) on Twitter by ex-kipper leader and Brexit fanboy Henry Bolton. Henry seems to play the text book estuary-gammon, for example he claims publicly to be very much against immigration but in his personal life seems to prefer foreigners? He's been married to a Danish model in the 80s, then a (much) younger Russian woman for a couple of years, then another young Russian woman for another couple of years (spawning kids all the way along) before finally in 2018 ending up on the right side of the Channel with a UKIP supporter/model/actress from Kent (24 years younger than him) whose racist tweets got him kicked out of UKIP (although he separated from her also in 2020).
I think I'm getting a picture of Henry and it's not one that's in any way punctuated by competence or reliability (TBH I feel sorry for his kids!) Henry can't even construct a simple Nationalist joke properly, the Spitfires in the picture are all from the Polish 303 squadron (the most successful in Fighter Command), you can tell by the little blue and white squared emblems next to the props.
The Twitter burns in response to this post were brutal.