drove off in car today turned heater fans on and had water pouring into passenger foot well .  got car back to my house had a look under dash to check heater matrix but all was ok no water any where  had a look under the scutle panel on passenger side . it was full of rain water the drain off"s were blocked with old leaves .and the water was coming through the pollen filter    removed all debris all ok now so if you see water in your car check scutle drain off"s .just thought id share that bit of info with you guys