I know this design very well, because we bought one a couple of years back at an auction house. But despite that, we don't know a lot about the actual maker of this 1970s white mushroom table lamp.
We would guess it was probably high street 'back in the day', mixing a wide metal body and perspex shade, with a chrome trim around the shade. There's also an inline switch that's original to the light.
It is described as being in 'fantastic condition', with no visible scratches and marks. With just a couple of days left, £21.89 looks like a very good deal.