Fast Bikes mag was originally owned by IPC Media with design studios based in Chelsea and Croydon before being sold to SPL publishing and moving to studios in Oprington.
Their address was at Berwick House, 8-10 Knoll Rise, Orpington, Kent BR6 0PS.
Don't know when they moved to Bath or who publishes the mag now but they were in Orpington about 15 years ago in very cramped offices. I've still got page layouts I did for them on one of my old Apple Macs.