In reply to Busby:
We also encountered a very helpful guide, last month, while on a 2-day ridge traverse, who, even though we weren't in his party, was very generous with his knowledge and advice.
Some of the information possibly made the difference between success and failure.
This guy was called Derek and, although I've never really considered using a guide before, was a great advert for using one.
I would like to know his website / contact details to be able to recommend him and possibly use him in the future.