Ford Mondeo engine has just cut out whilst driving and i can not restart

I would first check that the engine can be turned by hand using a socket/spanner on the bottom crank pulley ,that would rule out trimming belt failure or air con. Pump seized .then check battery voltage.then check power to starter motor when ignition switch applied.

we have discovered the problem,, there was a poor conection in the stereo wiring at the ignition end this in turn shorted out and blew the ignition fuse,