I have previously watched Joanna Lumley's documentary about the Northern Lights which I found very interesting. Apparently she went on to film at least another two travelogues on Nile and Greece.
Joanna Lumley's Nile can be found on megavideo in chunks part 3 and 4:
http://www.megavideo.com/?v=FAKJ7AWS
http://www.megavideo.com/?v=18555CXE
Having travelled a similar route myself I found it brought a lot of nice memories although my goal was not the Nile but ancient Egyptian monuments. But still it was very interesting how Joanna goes to discover little-known facts of life in Sudan such as dukan (I hope I spelled it right) and actually try it herself. Her describing it on Graham Norton's show was hilarious :)
And here is some information about her latest documentary on Greece:
http://www.dailymail.co.uk/femail/article-2046501/Joana-Lumleys-Greek-Odyssey-Greeks-rich-history-myth-stunning-scenery.html
