Your mock tests should last about 35 minutes, and include:
checking your driving licence
checking your eyesight
‘show me, tell me’ vehicle safety questions
general driving ability on rural roads, urban roads, dual carriageways, multi-lane roundabouts and one-way systems
reversing the car
independent driving for 20 minutes, either following directions from a sat nav or following traffic signs
an emergency stop
giving you the result and feedback