Fodens.

Bowyers being a local bodybuilder to Foden designed and built the cab on this OG model which has similarities to the one in the photo, maybe they also built that cab too, the S20 cab which has the same chrome trim design came out around the same time mid 50’s to replace the older S18 and possibly there was some influence for the S20 design, the cab on the first pic may be a sort of missing link between the OG and S20. Franky.