Gerald Cruwys. The white band on his cap shows that he was designated for aircrew training. Courtesy of Debbie Kennett.

Unfortunately, in the transfer from the old website, the biography of Gerry Cruwys written by his niece, Debbie Kennett, was mislaid. It is now back on the Mansbridge crew page.

Cruwys - Gerry in pilot uniform colour web (2)
Gerald Cruwys. The white band on his cap shows that he was designated for aircrew training. Courtesy of Debbie Kennett.

See also this post on a video about the Ottignies operation in which this crew was lost.