Bongo Fury

Hi all my bongo died on the m6 yesterday was doing around 60 mph it cut out and would not restart plenty of fuel in all electrics are fine key will turn engine over but it will not fire up any ideas ?
2.5 diesel p reg new head just fitted

The basic checks,

Make sure the cam shaft/ pulley is in fact turning, open an injector pipe nut slightly and check for fuel whilst turning over the engine.