Interesting read
Says you'll fail if excessive play in detachable tow bar/socket but it doesn't say if you will fail if you remove your detachable tow bar for the test
I agree though, it's got to be a good thing that the towing system is safe and operational. We get ours checked every 6 months anyway so it doesn't change anything for us.
Does this mean the fee will increase to take account of the extra time/checks ?