It has a very large Between Lens Thornton Pickard roller blind shutter.
It is definitely not a Lancaster Instantograph, they are very different. That's also a large lens as there are 6 or 7 screws to hold the flange to the shutter's front panel.
It is a Whole plate, or possibly 10x8, camera. Do you have any other photos, it's clearly a British field camera, unusually there's very little taper in the bellows (for a field camera). My initial thoughts would be maybe Watson Acme, but the way the front standard fits and tilts is unusual. It's a Patented fit.
That is an usual fitting for the front standard.
Sometimes cameras were custom-built, so identification can be difficult. As the camera has a circulat fitting for tripod legs, and the camera can be closed with the TP shutter (& lens) that rules out a great many manufacturers like Landcaater, Underwood, Watson, Gandolfi, etc, as their camers use a tripod sockect in the camera's base.
The round brass rotating fitting allows the centre of the base to be cut away to allow the camera to fold with the shutter attched.
Ian