First of all, thanks to everyone who has taken the time to think about this problem and contribute. I spent over an hour blowing recursion limits left, right and centre yesterday without getting anywhere close, so I appreciate the input.

I was excited to see Alan's solution working perfectly with my data, only to test it out using Craig's alternative (and valid) data and see it not work quite so well ...

It remains a problem for us here, which for the moment we are dealing with by hard-coding multiple recursion levels. But we have examples where the actual number of recursions needed to scrape all the details together is greater than what we have coded. So any further input is most welcome.

Thanks

Phil