Can I just draw everyone's attention to the
Mega Wales event page?
Look at the username of the organiser - the "UK Mega Event Committee"
The NW Mega will also be organised by the "UK Mega Event Committee" as it has been agreed we will be taking over that Geocaching.com account from the South Wales team after the 2011 Mega is over.
Therefore, the NW Mega will be the "UK Mega Event"
It's simply being described as such because it is the next incarnation of the yearly event of that name which started at Harrogate in 2008. Describing it in this way does not prevent there being another Mega Event in the UK during 2012, or any other year.
Hope that clears up some of the confusion.