Safe driving for life a website partner of the vehicle and driver standards agency is now offering free practice tests for your driving theory. There is no need to sign up, just choose:
- Bus & coach
- Heavy goods vehicle
And then you can take a practice timed test to check your knowledge before committing to the real thing. From their website:
Take official practice driving theory tests – for free
Here you can take official practice theory tests from the Driver and Vehicle Standards Agency (DVSA), free of charge.
Practice theory tests are available for learner car drivers, motorcyclists, lorry drivers, and bus and coach drivers.
Go here to take the test