I keep getting this annoying loss of electrics when its at the most inconvenient possible moment for instance after paying the A38 Tamar Bridge toll. When the barrier lifted I started to pull away then the engine ran sort of underpowered Stalled then Nothing.
Press Starter button, Tried to remove key fob, open door, then when I released clutch pressed down then the starter every thing came back to life.

This isn't a frequent problem but it has done this about 5 time in the last 6 months. I am going to replace the Starter Button as once in a while the first ignition doesn't turn off until the fob is removed.

Look at the clutch switch first... It's easier and, if defective, cheaper...