Well first off, let's eliminate some of the more common printers based on physical layout. I note that there doesn't appear to be any label on the front, where most printers would have one, but there appears to be a small one just above the buttons on the right. We also can't see either side of the printer where the paper knob would be, which would normally be helpful.
What we can see are a couple of details that seem useful:
three operating buttons on the right, seemingly in chicklet style
a metal paper "tray", which was not used by later printers
the buttons are in an insert area and there is a "step" just to the left on the front which appears to be part of the holder for the top cover, which has been removed (and almost certainly has the logo!)
So based on this...
It's not any Centronics that I'm familiar with, they just look different. They were generally not in use by this point anyway as lower-cost companies entered the field.
It's not any of the more common Japanese names like Panasonic or Toshiba, they generally looked like Centronics.
It may be one of the many 9-pin Epson models. They mostly had three buttons on the right, as seen here, and generally in a slightly lowered section, as seen here. Most examples will have white plastic buttons, but I know they made some with dark grey chicklets as seen here. Most notable is the metal paper "tray" at the back, which does indeed seem similar to the Epson from the MX on. However, Epson always had a large metal label on the front on the left, which I do not see here, but it's possible it's just hidden. We also can't see the right side where Epson always had its paper knob. Finally, the covers on Epson normally sat in an indent, so the lip on the front here seems wrong.
So this is pushing me in the direction of one of the many Epson clones.
Judging by the style and placement of the buttons and the metal paper "basket" at the back, this may be a Star Micronics SG or gemini series, in particular, the gemini-10X. However, the Star always had a logo on the front right, which is missing, although it's possible the UK versions were whitelabled. The other issue is that the buttons in the image above are inset, while the geminis I know are flush with the top. I know there were some differences between models, including ones using white buttons and other minor differences. Unfortunately, I can't find any sample output to compare, although perhaps someone with better eyes than mine can find something useful here.
My feeling is that it is likely a model from the 1983 through 1986 time-frame, because after that you generally have sheet feeders instead of roll feeders. For instance, compare with the Star LC-100 and similar models of the later 1980s.