Most here won't know what E & T Underwood cameras look like. They were quite a large manufacturer but only for a short time, Edward's brother died in the mid 1890s, I think 94. The factory was 3 stories and two rooms deep, there must have been steam power.
I worked in Birmingham for nearly 30 years, and many buildings in the industrial areas were quadrangles and would have had a steam engine in the centre to power machine tools. Birmingham was not heavy industry, rather the more intricate light industry finished good, a Jewellery quarter, a Gun quarter, and everything between those extremes. Raw materials came from the Black Country and Staffordshire, big coal and iron producers.
Birmingham camera manufacturers in the late1800s and earl 1900s made cameras distinctively different to those from London and Manchester, etc, part of this was the locally produced brass fittings. There was also innovation. The first autofocus LF enlarger, by that I mean focus remained corrected as you increased column height, Lancaster.
Ian