Water in drivers footwell - 1996 Rover 220

First of all does it have a sun roof if so open it and look for the 2 drain holes on the left and right corners, factory sun roofs have drain holes with tubes leading down through the car interior to the area just behind the door in the frame for drainage if they get stoped up they cant drain and water will fill either floor board, you can blow those out with a blow gun and airhose, also check under the cowle and be sure its not full of debre, if it is then get a stiff wire and clean the drain holes located to the left and right corners of it as well as they get stoped up and water can enter the car and leak into the floor pans as well