Having trawled through a few adverts I'm wondering if it was possibly made by Patrick Meagher of 21 Southampton Row, London. What's quite unusual is the one wooden strip that holds the lens board is shorter than the other to allow for the thumb wheel locking the rise/fall, this can be seen on some Meagher tailboard although at the top rather than the bottom on the examples I've found online. Also Meagher doesn't brace the corners on some of his tailboard cameras.
The issue here is around the Holborn and Hatton Garden area of London you had quite a number of manufacturers. Meagher, Lejeune & Perken (later Perken Son & Rayment) , Watson, Gandolfi. Houghton, Butcher, just to name a few, of those though only Meager made a tailboard camera without the corner bracing. Patrick Meagher had initially worked for Ottewill (camera makers) setting up on his own around 1858/9, he died 8th May 1897.
Unfortunately identifying cameras like this is uncertain until you come across another with a name plate or good adverts in old BJP Almanacs or similar.
Ian