Air cooled radials 

A recent addition uses this source  to claim that the Heron head was invented by Gibson & Heron at the RAE in 1918. Now Heron is an uncommon name. I'd expect there to be some involvement, whether now or later. However I'm unconvinced that this Gibson-Heron head is at all related to the Heron head.

The Gibson-Heron head is a design for sealing the head of an air-cooled radial engine, so as to give good thermal transfer and thus avoid valve overheating.

The Heron head, as used by Jaguar, is a design for combustion chambers.

Is there really any overlap?