2004 Ford Mondeo cutting out

I'd suspect a fuel problem so start with a new fuel filter.

Start with simple things first, change spark/glowplugs, air and/or fuel filter,
It seems fuel related in my opinion, I wonder if it could be your fuel pump ?
When you turn your key in the ignition have a listen for a whirring type noise either inside your car or underneath the car, if you hear no noise the problem is quite possibly that your car fuel pump needs looking at

i have fuel leaking around the injectors & when cranking over it drains the battery

You will need to address the fuel leak problem first as this could course air to be drawn into the system.

another query the same car the battery keeps going dead i charged it up to 100% & as soon as i try starting it the battery goes dead i have tried two different batterys tried jump leading it from another car it turns over it trys to fire but it dos'nt anyone got any ideas