Cheers Roger - its good to have somebody with a bit of local knowledge on this forum.
To respond to Oly -
Yes you're correct Valencia is not in Catalonia (at the moment!). However, from about the XIII century to the XVIII century, I think, Valencia was united with Barcelona as part of the Catalan-Aragon Kingdom. That is the reason why in Valencia, they speak Catalan (in the Valencian dialect).
There are people who long for a reunification of the Catalan Countries (North of France, Catalunya, Valencia and the Balearic Islands, basically), because people in these places share the same language and some of the same traditions.
Anyway, that's basically why i thought Valencia might have been involved in the Catalonia Cup.