OK, If I make it the first redirect then the redirection works - regardless of what is written after the 'c-21.html'.
However the redirect is retaining the erroneous URL data after redirection. It is adding the '?blahblahblah" to the end of the new URL. I want it to dispose of this so all the redirects are routed to just one URL. How do I instruct it to not include this unwanted data in the new URL?
Thanks