The Artillery Trailer, or “Limber”, was used to carry ammunition and equipment for the gun.
The Limber carried 32 rounds of ammunition for the 25 Pdr Field Gun or the 17 Pdr Anti-Tank Gun, along with extra fuses. The personal kit of the Gunners was carried under a tarp on the metal shelf on the front of the trailer.
The Limber was unpopular as it made backing up very difficult. A Limber had been required for centuries to bear the weight of the gun in order to allow horses to pull, but it was no longer necessary with vehicles. Use of Limbers ended after the 25 Pdr went out of service. Since then, ammunition and stores have simply been carried in the towing vehicle.