jay 95% chance its the door foam stuff that is behind the door cards! mine is leaking through there and into the footwell and i had a ocean in there!
quote from my bodywork mate '' if that foam/seal is broken anywhere water WILL come in ''
hence i have got some new one's on the way, can get you some if you need... mine had a prev owner make a right mess of them so i've had to remove all the sealer and do it all fresh to go with the new seal...
(failing that loom holes and theres 5 holes i think where the battery stay thing goes.) BUT i almost guarentee its the door seals...
IS VERY GOOD YES......

Adxx