Graham
I can't help but think that you are being a bit drippy here. There is more than enough trials information on the internet given just a few moments searching, and that's not including where we are at the moment or the TMX weekly paper.
Take our local ACU site - http://www.motorcyclesport.org.uk/trials.htm - all the years events listed for the centre, and anything you need after that check the individual clubs website or speak to the club contacts.
First port of call for most newbies is a local club - join for a small fee get your ACU application form signed and pay your tenner - sorted.
Can't see it could be any easier - Am I missing something?