Assuming that UCC is the same as MGE (what it is called in the U.S), you can run FW scenarios in MGE. There are a couple of problems however.
1. In MGE 3 point objectives do not work, so if the FW scenario has 3 point objectives, you could play it but the scoring won't be right.
2. Most players claim that the MGE computer controlled tribes are much more aggressive than FW computer controlled tribes. This can throw the scenario balance out of whack.