In reply to Climbing Pieman:
I didn't see all of it, but it was pleasing that it did seem to be something that David Attenborough had a major part in creating, rather than "lending" his voice to someone else's creation, as a few of the projects with his name on do appear to have been in recent years. No criticism of DA implied. If I can be a quarter as active and dedicated in my 90's as DA I would be immensely proud, and, of course, there is absolutely no chance that I could be as influential.
Martin