Since the start of the twentieth century, gun carriages have been used to transport the coffin of a monarch; previously, it was either carried by bearers or placed on a horse-drawn bier (depending on how far it needed to travel).
Gun carriages have been used to transport the coffin of a monarch. This was since the start of the twentieth century. It was either carried by bearers. This was previously. It was either placed on a horse-drawn bier (depending on how far it needed to travel). This was previously.