Jon wrote

My preferred method is a sprinkling of firelighters in the base of the
tray, a covering of lumpwood charcoal, and then charcoal briquettes over
that. Pour half a cup of petrol over it all, leave for 2 mins to soak
in, wash hands (to remove any petrol) and then chuck a match on.

snip
What does everyone else do?

Well, as this is d-i-y, the best version would be:

http://www.youtube.com/watch?v=TBLr_XrooLs

or, if you can't get hold of the liquid stuff, try this

http://www.youtube.com/watch?v=O9Ey4eWN6Bg

or if you can't get hold of either, try this:

http://www.youtube.com/watch?v=GD9uyOfMs9I

g

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-blj-