Cheers mate. @relgate after the first trip where I had water leak into the rear boot (which happened to have the kids pillows and our towels in it!)
I figured that it would only leak internally if it had water in it when travelling.
I forgot to open the lid before setting off on Friday, but we did have some rain.
I'm going down to Clark rubber today to see what I can do about it, but if all else fails will also still a couple of drainage holes.
Yeh, just a dodgy design I'm afraid