P1621 to P1628 are immobilisers related fault codes, the important thing is to understand what you have used to read the fault codes, as there is plenty of kit out there that will send you on a Wilde goose chase ! Does it actually turn over or is the starter circuit immobilised ? Most common cause of non start is stuck EGR valve and blocked micro fine fuel filter in the fuel pump under the banjo bolt.

plugged into a texa diagnostics machine via a cable as these are non compliant. not doing anything, no action from engine whatsever just died completely. tried phoning ford but they are not interested atall :-)

Paul