You'd be surprised which professions are still in full swing in London. Aside from gas lamp lighters and chimney sweeps, there are also blacksmiths.
As this video, by HD House, explains: "Neil came to the world of the Hot Metal Works relatively late in his working life. He has worked in various fields including model making and IT. Nut he knew that there had to be more for him, something that he really enjoyed and could excel at."