Little update! Its been to the garage, well it's still there. It took them only a couple of hours to work out what was wrong, unlike the first that took 4 days then repaired the wrong thing. Firstly it's the matrix and another leak on something else which i've forgotten but it wasn't a big deal and that one was easy. There's also a problem with the air con leaking but apparently if they start fixing it, it could open us up to a whole world of problems. Seeing as we don't use it, they're just going to seal it off so its not leaking and the car won't have air con. Finally think we may be getting somewhere! We'll see when we get the car back! Thanks everyone for all your help, will let you know how we get on!