http://www.motuk.co.uk/manual/mc_contents.htm

have a look at the relevant sections.
I would recommend having a chat with your local specialist bike tester as opposed to a car tester who does bikes.
road legal tyres definitely, buy a 2nd pair of wheels , some tracks also require road legal tyres. infact some race classes demand road tyres so always useful.
squeezy bulb horns were used but no longer passable as need to be a constant note , Ive used bull frog horns with 9v battery but some testers don't like them as not powered by the bike itself.