how can i destroy a laurel hedge that has become redundant

Yes probably. Is it so difficult to do though? I always thought laurel a very boring plant, and not much good for attracting birds etc.
If you lived anywhere near me I'd come and help!

you could cut it to the floor and cover whats left with black polythene .it will take a little while but it will kill it

Or cut it down and treat the stumps - see my blog on tree stump treatments, tells you what to do.