Licence can be obtained here: http://wales.gov.uk/topics/environmentcountryside/consmanagement/conservationbiodiversity/wildlifelicences/wildlifelicences/?lang=en
I suggest you download a copy for future reference.
Thanks for the advice guys,,, All i know is if you picture the scene 2 fields opposite each other,Straight down the middle of the 2 fields is a stream,This is a boundry,,,,Now according to the farmer i had the permission off everything on his land including the rookery is his,But everything on the otherside of the stream is this eco worriors land an