Sorry for the delay, Trev -- just haven't had much time to be online lately. Chats perchs is the latest political address by Marker who continues to employ innovative techniques (although, oblique to some) to get his point across. His astonishing oeuvre continues to propagate onto various other media -- basically, it's very hard to keep track of (much more than his counterparts Peter Watkins and Fernando Solanas). Chats perchs doesn't have subs even though Marker uses intertitles instead of a commentary. It comes with a booklet and other paraphernalia. I think his two famous works Sans Soliel and La Jetee are available in the U.K.

I initially read about it in Film Comment: it was reviewed by British critic Chris Darke (too bad it's not available online). So, I guess it was a blind buy to some degree, but that's not a problem when the work in question belongs to Marker.