Ford bantam 2008 1600cc

so it's a manual tranny ? You'll have to test for proper fuel pressure and spark when the problem occurs , intermittent problems are the worst .

We have had a few of these like this. Check the Amp draw on thee main starter cable from thee battery to the starter. If the Amperage is too high it drains the current to the PCM/ECU and it wont start when cranking when cold. Check also the starter solenoid cable to the solenoid switch runs in thee same channel as the Crank Position sensor. Separate the two, as when the engine is cranked, the solenoid current induces the current to the CKP sensor wiring which are twisted pairs and interferes with the current going from the Crank sensor to the PCM

Change the Temperature sensor, the one on the plastic housing above the gearbox