As an HGV instructor albeit in S Wales, be very wary of brokers.I'm in Oxford
A company near me thrives on the income generated, has a comparatively low pass rate and a high retest charge.
Go direct to the company. Look at the trucks they use: you should be able to get a 1 hour assessment drive for free. If the truck looks like a dog then there are problems.
We tend to recommend a 20 hour course, including test, for Cat C and for C+E, unless you’ve been driving large vehicles or have trailer experience in which case we drop to 16.
Ask if they have a dedicated reversing practice area. Any company worth its salt will have an area laid out identical to the one at the test centre for you to practice on. If they’re doing it in a truck yard using sticks and stones and discarded pallets they’re a joke and best avoided.
I’ve been in the commercial HGV training business for 8 years and was at DST before that .
Feel free to PM anytime.