I remember the same machine at Victoria coach station, but the ones I got were better quality.
At a trade exhibition about ten years ago there was an American working in GB who had a machine which made excellent chips. He'd gone too far with the idea, though, and the chips were made from reconstituted dried potato - sort of dried Smash. While they tasted OK, there was no advantage because they were more expensive to produce than real chips - I don't think he realised his price was off until he found he was competing with two other automated chip machines at the same exhibition. All the same, his was the only machine there which could vend chips unattended.