None unfortunately, all you can do it make it more difficult for them or the ball to get in ur garden. Bear in mind however that if you attempted to prevent them entering you're garden with e.g. barbed wire...and they hurt themselves, they would have a claim against you.
In short, unlike America, there is no stringent trespass law and unless they are really damaging you're property, there is legally nothing you can do about it!
Sorry!
submitted by Mike in Edinburgh
@ February 02, 2010 - 03:55 PM