Glad you got your trailer back.
A couple of ideas if I may, and sorry if you already do.
Paint your post code on the roof in huge letters, so that they fill the roof space, do it with many coats that way it’ll show up even if it’s painted over. Makes it easier to spot by police helicopter or easier to prove it’s yours.Clearly painting the side panels and ramp with your post code also makes them less desirable to thieving scum. This also applies to caravans etc even if you have a tracker.
A big equestrian crime is saddlery/ tack and sundries which is often kept in wooden sheds etc. See if you can get an old chest freezer, put a couple of strong padlocks on it and you have a very heavy secure locker. They also make great mouse proof bins to store sacks of feed.
Again, I’m sorry if I’m teaching granny to suck eggs.
