I was showing my step-daughter my ever-increasing collection of DAN DARE originals, and noticed something. The character of Sir Hubert Guest, the Controller of Space Fleet, was modeled on Frank Hampson's father, and extensive photo reference was used by Hampson, as well as the various artists who ghosted for Hampson, and who later drew the strip under their own names.

These two panels are from stories that were published a few years apart:

.........

Hampson was a stickler for accuracy to the extent that Arthur C Clarke gave up being his advisor on the strip.

He had a studio in Epsom, just down the road from me, and practically every human character was either a member of the studio, his dad as you mention, or people from Epsom.

I was talking to a woman in a coffee shop the other day as her son was interesting in my sketching and it turned out her father was used as a model when he was a schoolboy.

If you haven't got it, Alastair Crompton's The Man Who Drew Tomorrow is a wonderful read and has been updated as: Frank Hampson: Tomorrow Revisited which corrects some of the errors in the previous version but both contain substantial pics of reference materials including poses. 

Always was grateful for my dad for keeping the first three original Eagle Annuals which fed my Dan Dare habit!