www.mirror.co.uk/news/real-life-stories/incredible-story-spitfire-pilot-who-6675910 [this is an old article]
The article features the caption 'Proud: Roberts Cowell's daughter Diana.' with Diana holding a picture of her father Roberta Cowell (the MTF transsexual castrated by Dillon) . The Picture Post paid Cowell the then [1954] huge sum of £8,000 for 'Roberta Cowell's Own Story'.
In fact, Robert Cowell abandoned his daughters in 1948 after cross-dressing and leaving his wife, and never saw his children again, dying in 2011.
Cowell claimed to be intersex, XX male. www.lizhodgkinson.com/lh/pages/journalismArticle/interview_with_transsexual_roberta_betty_cowell
and said
"I was a freak. I had an operation and I’m not a freak any more. I had female chromosome make-up, XX. The people who have followed me have often been those with male chromosomes, XY. So they’ve been normal people who’ve turned themselves into freaks by means of the operation."
However this is impossible, as XX males are infertile, and Cowell had children....
Michael Dillon, meanwhile, was born Laura Dillon, and was the younger sibling of Sir Robert Dillon, baronet of Lismullen.
Dillon's status was exposed after Cowell alluded to Dillon in interviews. Dillon took testosterone and had various sex change operations, and was able to change legal sex .
Debrett's Peerage reported: "If a person is registered as a male ... by the registrar-general" [they will be next in line to inherit the Baronetcy]
and it was reported that Michael Dillon expected to be next Baronet
While Michael Dillon's brother, Robert said:
"It is not too late for me to have a family [he in fact died childless]. And of course I can will my estate to anyone I choose. I have no intention of leaving it to my sister - or to my wife. One never does"
After this Michael fled to India, to live as a Buddhist, dying five years later aged 47 from the poor diet and living conditions.