Caravan mover damage
If you have a mover fitted to your caravan, check the clearance to the tyre on the inside. I have just been called out to a caravan, where a screw head on the mover had cut a groove into the inside edge of the tyre causing a blow out. It  had been fitted off centre by around 10mm and that was enough to cause this problem.  Luckily for this customer he had tyron bands fitted and was able to drive to a place of safety to change his tyre.  Hometyre do not fit or adjust movers, if yours has a problem you will need to take it to a caravan service centre.