Although only ceremonial now, the tradition of cart marking goes back to the 16th century. An early form of protectionism for the industry of carmen. The city granted them certain rights to enter the city and carry goods. In exchange the carmen kept the streets clean and charged reasonable rates.
Remember around medieval times sewerage was one of the biggest problems in the streets.
The ceremony now has a line up of 46 vehicles ranging from horse-drawn to modern electric and hybrid engine buses and trucks. Each coming to have their number branded on a wooden plaque attached to the vehicle. The branding is carried out by the Master Carman and the Lord Mayor of London.
The Master Glove Maker gets a look in presenting each of the 'branders' with a set of gloves to protect their hands during the process.