I couldnt find anything that would help!! I practised lots but then took a few lessons with an instructor to practice the manouvers. Im so glad I did!! I failed the first test because of the reverse and then passed it second time round.
If you lPM me and let me know your email then I will send you the document I prduced that tells you all about it and what to expect.
I did the test yesterday and passed! I had lessons though and my instructor told me everything I needed to know, this website : http://www.towinghorsetrailers.co.uk/index.htm also tells you eveything. Good luck!