Thanks for the help guys.
Managed to dowload it as a text file.
The "print all linked docs" option looked quite promising, but it also ended up bringing down docs which were not serially related to the first page of the thread. I ended up waiting for ages as the printer churned out pages from other bits of the PPRuNe site. In the end I had to cancel all the print jobs.
Anyway, I have learned a couple of things through trying it. That's always a bonus!
Cheers both.
ST