Help! ..my Engine Died Sti 06

[weemac2000]

On motorway, slowed for 40mph restriction at roadworks, changed down from 6th and engine just died, no spluttering or hesitating, off like a lightswitch.no CEL,

Starter ok, fuel pump ok, Alarm module ok. No spark at plugs. Voltage to Ecu ok, fuses all ok. No fault code through OBD

All engine earths ok, ( 2 x LHS Inlet manifold, 1 x rhs manifold, 1x gearbox, 1 x starter.)

wiring looks ok everywhere.

ideas?

[drb5]

Possibly a split pipe or something.

Car not still under warranty though?