Thanks for the reply,
I've now setup a table which holds the following:
team id, team name, district name, area name.
When creating my report I link from the main dataset to this new table using the team ID field.
I have been able to create the cascading parameters and they work as expected.
The only issue I have now is how do I give the user the option of choosing ALL instead of picking a team, district, area from the list. I have seen that the asterix can be used as can the word ALL but I would like to keep the parameter as a drop down list rather than a box where they can type in.
Any help greatly appreciated.