One or two people have been having problems with the Asthma UK message board software (if I can call it that!) messing up long web links that they have pasted into their posts.
The best way around this is to go to tinyurl.com and use the tool there to shorten the link you want to post. That way, a long link like this one:
...which is nice and short and won't be messed-up by the message board!