HB Models was the business of Harold and Barbara Denyer, the HB being their initials. HB Models offered a range of live steam models in both gauges 1 and 0, including, in 0 gauge, a GWR 57xx tank loco, a 4-4-2 Tilbury Tank, and a Jinty during the 1970s. Their range was advertised in Model Railway News, May and August 1977, and was available 'ready to run' and as kits, each model being identified by a builder's number on the frames.
The model illustrated below is Gauge 1, as an example of an HB Models locomotive.
HB Models live steam Gauge 1 homage to the Bing for Bassett lowke 112 tank loco
Special thanks to Mark C for the photo