Tks for that.

I rang them to say what you said and they told me that the bulkhead is designed with holes in it to drain water etc., that's how its made. Therefore the bulkhead is designed to leak water so this is not the problem. Therefore the leaves blocking the holes are what they insist is causing the problem. To be honest, I cannot see where else the water could be getting in, I'm pretty sure the door seals are fine.