Because it is encourages people to behave dishonestly. Its pricing people out of doing something that’s a requirement but one of those requirements that has to be funded privately.
I could understand that training may be required and that completion of a course could be listed on ones license but why retest someone’s driving when they already have a driving license. The average cost of trailer driving tuition is £90 per hour, a test on a week day is £115 and a test on the weekend is £141 which is ludicrous. If you need to use the trainers car for the test they will charge you a further hour. The money is completely out of control and the costs of trailer training are the cheapest of the trailer. LGV/HGV training is hugely more expensive than this.
Here is an example, I took a two day course at a cost of £474, and the test was £115. On the first day the trailer trainer said my test had been moved to 10am the next day so although I had paid for two days I was effectively getting one day. The test me all through reading town centre which is highly unlikely with a horse trailer. I perfected my maneuvers on the first attempt. I passed all the required safety checks and managed to safely couple and re couple the trailer to the vehicle. I then went on the road for over an hour (recommended time 50 minutes). I was exhausted and nervous because I wanted to pass for financial reasons. As I turned back towards the test centre I found myself at the front of a queue at a set of traffic lights. A segregated bus lane was to my left. The bus lane turned green and I went to put my hand on the handbrake because I thought I was my lane. I didn’t move off the line and I certainty did not put anyone in any danger. The examiner yelled stop before the handbrake was even off and that it had caused me to fail. This was despite having a few minors during the test and that was it. Why should he fail me for a driving error when I am obviously already safe to drive as I have a full driving license? I didn’t move over the line and I noticed that it was not my light almost immediately but he had shouted first. So, I failed the test over £500 out of pocket. Taking it again has cost a further £260 which is bananas! It was obvious I knew how to safely tow and it was obvious I knew what I was doing. Situations almost identical to this are always happening and I wonder if the centers have a quota of failures per week to make. It’s really really bad behavior and totally penalizes the honest few who are trying to take the test to make themselves a legal driver.
Trailer trainers have you over a barrel and they use and abuse it further encouraging illegal driving and use of trailers without the proper licensing.