Trailer MOT Requirements

Can somebody provide a link to all the MOT req’s for trailers if possible??

A friend and I have just purchased an old tandem axle curtainsider, we intend to use as a mobile stage for Charitable music events (all non-profit). The trailer was last MOT’d in 2011 and was delivered to us on Trade Plates. We are starting to prep it for MOT. For starters, there are some short gashes in the curtain that have been covered with gaffer tape (about 5 inch tears) would this pass■■? Chassis, brakes, lines, tyres etc all good (apparently…)