Weather, very British.
and totally appropriate for the First World War trench experience
Guns for the boys
Interspersed with WWI horses
And a lot of water
(yes, ok, so we did sneak round the back of the marquee because all the tickets for his talk had gone even though we queued, and we did get told off by some jobsworthy English Heritage woman for standing outside the marquee and looking in (!), but I did stand my ground (since when is it a crime to stand outside a marquee?) and we did see Michael Morpurgo and it was very much worth an English Heritage bollocking to do so and I would highly recommend that anyone else does the same)