I’m standing in a car park with three canoeists comparing folding saws and hatchets. One of them has a scythe. This wasn’t strictly what I expected when I posted a note on a forum, but my new found friends seem to know what they’re doing so I resolve to sit at the back of the class and treat this as a learning opportunity. Within the hour I’m playing limbo with a tree, struggling through 2m tall reeds, and looking at a motorway from underneath. You sure we’re still in Chertsey?