Just came across this article on a friend of mine who lived in Aguadulce, near Roquetas de Mar. He was in his nineties and was more energetic than people half his age.

[theguardian.com]

The story of the Sagan breakout became widely known with the publication of Paul Brickhill's The Great Escape (1951). Twelve years later came the release of the hugely popular film, partly based on the book, with Steve McQueen among its star-studded cast as the fictional American serviceman, Virgil Hilts, the "cooler king".

When the film's producers were looking for story lines, the reputation as a serial escaper of Eric Foster, who has died aged 102, provided background for the McQueen character, and Foster was a technical adviser on the film. The irony was that while he was at Sagan during the breakout, he was not part of it. Yet he had been busily devising a plan to get home that was every bit as ingenious and, in its way, as dangerous.
(What's more, it worked!)