If its MFI there is no fuel cut off, thats EFI only.

Many years ago when i was a kid, my mum had a MK4 MFI orion, for years we had problems with miss firing intermittently, my dad spent a fortune continually replacing the dizzy cap, rotor arm, leads etc for proper motorcraft ones as that was all the cured the problem, then towards the end a few times it died like yours, and wouldnt always re-start straight away, turned out to be the ignition module.

Never played up after.

If i were you give it a service, new cap, rotor arm, leads, see how it goes, failing that its more than likely the module, or very unlikely but maybe the dizzy itself. My moneys on the module.