Appart from a “G” imprinted in the fork crown there are no markings lending an idea of the make, however I have had a few people tell me that they believe it to be a Geoff Scott custom, based on the “aero” ovalised tubing and seat post.
I knew a fella in London who had something similar and used it about town on a regular basis. Ran a 24" front wheel = sensible stem + Rizors FOR THE WIN.
What a joke. Neg feedback that guy for sure! He would probably get more money if he took the stupid stem and drops off it, because it just looks un-rideable like that.