Elger,
I would gladly sent you the photos attached to an e mail, as I do not know how to attach them to a message on this site.
Have you looked at the 38 group site, on the 644 sqdn home page is a side view photo of the Halifax that my father in law flew in . Also on the site ...'644 squadron , The Sandy Barr story'.There are several photos, one of which is a Halifax towing a hamilcar glider which I think may be the same photo I have[ judging by the cloud formations]