Hi Lauren,
It looks like you might be experiencing a different issue.. It looks like your link has an extra space on the end of the target location. [2020" "] which then resolves to http://www.managers.org.uk/management2020%20 + CD tracking Parameters rather than http://www.managers.org.uk/management2020 + CD Parameters.
It does work with parameters when the space is not in the URL.
See sample below:
http://www.managers.org.uk/management2020?SampleParameter=0