Dealer level Diagnostics at a fraction of the dealers costs.
Under Vosa regulations, for your car to pass part of the MoT regulations all warning lights are required to illuminate and then go off. Any remaining illuminated will result in a fail.
So why not have any faults investigated prior to your MoT test? It may save you time off the road with your vehicle.
SnapOn Verus Edge. 
An extremely powerful diagnostic scanner, incorporating a four channel oscilloscope, graphing multimeter and voltmeter.
Nige Cowie Advanced Diagnostic Centre 