Have blanked off the EGR Valve.
Its still in place and connected though.
First two drives the car was perfect - smooth and more responsive I thought to accelerator pedal.

But started the car today for work and the engine Check Light has come on.
No problems with engine - still smooth and performing normally.

I would have thought with the EGR still connected and from the ECU's point of view, still working. Why would the engine Check light have lit up? It never lit up when the EGR valve was misbehaving and causing a lumpy erratic idle, so why would it light now that its been bypassed and the engine is working beautifully?