The clutch switch - is actually a hall sensor - so basically a magnet and a coil of wire, when the magnet (in the clutch pedal) moves away or towards the coil of wire (the hall sensor) the ECU can read this change and determine when the clutch pedal is engaged/pushed down to allow engine start.So if I ring electricians today and again push for the switch to be checked, is that definitely something to would cause the symptoms the car is having, not starting, not communicating. I don't want to sound stupid
If this is not working this definitely will not let the engine start, or even crank/turn over. For safety reason so the car can't lurch forward when starting if in gear.
To test it is simple - you need to plug in a (decent) diagnostic interface/computer and can check clutch pedal function/actuation.