johno wrote:

I have a large garden surrounded by Leylandii and will be removing
them on a regular basis, however disposing of the evidence is a
problem.

Leylandii make decent logs, although they burn a bit fast and the
branches and foliage make excellent compost when shredded. Why bother
burning them prematurely? Cut down, grub out the roots, strip off side
branches and shred, then compost the chippings. Leylandii breaks down
spectacularly quickly and makes first rate compost.

Take the trunks, saw into sections and burn them over winter, that's
winter 2010, not 2009.