I hope you dont have the issue over where you are mate, its sickening, weve spent alot of cash and alot of hard graft to get our lake what it is today and now were in the process of fencing it off to all other wildlife because we are having our stock eaten alive. There is otters in every english county not sure about wales and scotland but in know they are in some iv seen them.
cormorants can be shot under licence and iv been told recently that they maybe going on the general licence, otters cant be shot,trapped or moved legally at all atm.
From what I've heard you apply for a lice