Evening all, Just got a 53 plate 1.8 zetec mondeo (last nite) and it started on the button this morning when freezing cold yet been out in the car most of the day and once driven and up to temp it will turn over for a while before starting?? Not on the button?? Any ideas Everything else seems fine

 

Slow as in slow turning over or just takes a longer amount of time to start than usual?

If its turning slow depending how close your starter is to your exhaust that could be the cause.
Im not sure on the mondeo if the starter is at the front or back and where the exhaust manifold is but if they are near to each other and the heatshield is missing this could be whats causing your slow starting.
Had the same issue on a xr3i years ago

 

If you mean it turns over for a while without firing then rumbles into life then it is the crank sensor.