We always get a storm, usualy when Rich B arrives to set his tent, so nothing new there.
Those images, are they the field we are in or the one on the other side of the road were caravans park? There is that big drainage ditch (were the corsa/astra took a swim) by our field so that should cope with a fair bit of water.
Suppose we could just phone up and ask them how it is. Found them on facebook now if thats worth checking out.