Thanks Danny
I have solved my problem but thought I would post the solution:
My initial attempt used Internet Explorer as that is my usual system. My wife uses Google Chrome. I just entered the BBS via Google Chrome and access is virtually immediate on the 'i drive' link. PDF now safely stored.
I recall finding this problem before with some web pages ... IExplorer has problems, Google Chrome or Firefox go straight in.
So ... thank you.
Cheers, Phil (very happy now!)