L&M -- we should talk before you buy any light as they're a sponsor
I remembered that soon after I posted...idiotically.
Doing the Dark Mountains Marathon, and my little tikka is not quite up to the task I think
you can take my big torch. It won't last the full time though you may be able to borrow another battery for someone. Also lasts a lot longer if you don't use it on full (whilst still being pretty bright)