py8706150 is the number under the bb...
That format suggests Peugeot, certainly a large scale manufacturer.
This page makes things even less clear...
@Scilly.Suffolk started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
That format suggests Peugeot, certainly a large scale manufacturer.
This page makes things even less clear...