If we were to expect our Clients to commit to an inflexible course of training without even assessing their driving, then we could be committing them to more training than would be necessary for them to achieve a reasonable chance of passing the trailer test. We encourage our Clients to adopt a simple and efficient style of driving which minimises pollution, reduces vehicle running costs and, of course reduces the chance of accidents. Examiners appreciate this approach and consequently we have a high pass rate. Trailer lessons - Many drivers do not realise that they need to pass a test to pull their horseboxes or car trailers.