Rather than create a thread about it, just to let you all know after mysteriously not showing it during December last year when previously advertised on Pokemon.com, CITV will now be showing Pokemon Movie 15 Kyurem VS The Sword of Justice at 9.25am this Saturday 13th April, according to the Freeview guide. To answer Xlate, I think that CITV is the official channel as since Pokemon Movie 13, Pokemon.com has been advertising CITV to watch the movie but I guess it depends on whether any further licenses can be issued by TPCi which is probably why Disney XD also show Pokemon albeit later than CITV.
As far as I'm aware, CITV "outsource" the bulk of their content from other networks, CN being one of them though for Pokemon I'd imagine that they need a license from TPCi, but its quite common nowadays for other channels to air the same show. For example when the BBC air a new episode of Top Gear, a few months down the line, you can expect a repeat of that episode on a channel called "Dave" which is run by UKTV and is part owned by the BBC so BBC 2 is the official channel for new episodes of Top Gear with "Dave" showing repeats when they can get clearance so this is probably a similar process as to what goes on with Pokemon here but cable and satellite owners may have the added benefit of watching the repeat on an HD service which CITV does not currently have that facility yet.