Question Author
Thanks for your sensible answer beejay - will follow your advice.
To the others I say this......
When I was a postie and was attacked by dogs I always said there were no bad dogs, just bad dog owners.
I apply the same reasoning to leylandii; it's not the plant that causes problems, it's the owners who dont keep them under control.
Unfortunately none of you know the situation I have.
I need to secure one side of my large plot, I need a thick fence for security reasons (to deter idiots from the mobile home park next door coming through), I need it to form a windbreak (very essential in the Fens) and, sadly, I need it quickly in order to establish a boundary line before the new owner of the mobile home park decides to pinch some land by moving the boundary.
You all decry the use of leylandii, but none of you suggest anything else which fits the criteria.
So I'm waiting for your suggestions, anything which will do all of the above.