The main ones are cast aluminium 18 inches in diameter with lettering in relief and can be repainted when badly worn.
In the case of Whitkirk Manor House (155) a rectangular one was used to get more words in the restricted width.
Four (60, 62, 63, 72) are millennium plaques of 20 inches with gold letters and edging.
There are also printed polymer ones celebrating the LGBT history in Leeds, referred to as Rainbow plaques.
[2] They were officially launched on 1 August 2018 to be on display until 17 September.