andyzed, thanks for the information. From that other thread it does look like the roadsters have a problem. Pity had a saab convertible before this and it could be in the middle of a force 10 gale and not let a drop in. Still it doesnt sound like the zed.
Garage have said they will keep it until its waterproof and i couldnt ask for more than that. I guess if it continues to be a problem i will look to exchange, trade in for a coupe. Pity as i love the look of the roadster. Still, im an optimist and the garage will have it back all 100% watertight in no time im sure.