wet passenger rear foot well corsa

pd52

Im at the end of my tether with this bloody leak! :mad:for a while after its been raining the rear passenger foot well is soaking wet, today it was chucking it down all day the i used loads of cardboard to soak it up. after much googling i came across a possible cure - BCM cover ( basically its a lid that goes over the fuses under the scuttle panel on the left hand side - common prob on the corsa c) so bought a new lid, had it put on - still wet.

Went to my local mechanic and he said leaks are hard to find etc he checked the door seal and said it wasnt coming from there, but noticed the window screen wasn't the original one and suggested I had the window screen taken out and rebonded back in to start to eliminate it wasn't that - which i did for £40! - still wet!

The front doesnt seem wet or that damp I guess because the water runs to the back.

Any suggestions and help would be great thanks in advance, cant stand having a damp car and the windows constantly steamed up