I'm glad to say that the film is now completed, and will shortly be broadcast on the UK's Channel Four on the 25th May at 10pm; with luck, it will then also be available on their catch-up services for those not in the UK to be able to view.
I've not seen the film yet, but if you'd like to see the short trailer, it's available now on YouTube:
Guy had hoped that I'd be able to be one of the main 'characters', and talk from the perspective of a long-term pup - unfortunately, my employers were concerned that my being involved might bring them into 'disrepute', and so we had to keep my contribution shorter and more anonymous than we'd hoped. I think we still managed to make some informative and insightful comments...
Watch, enjoy - and let me know what you think!