1997 Ford Mondeo keeps cutting out when i slow down?

Hi just thought id give you guys a try as im almost at the end of my tether. Just bought a second hand ford mondeo 2.0lx having owned a 1.8lx a couple of years ago. My new car car now repeatedly cuts out when stopping at junctions. It starts straight away when i turn the key but this is not very practical. Anyone got any ideas???

Any ideas would be most welcome.
cheers