Bond leased Gama a/c and crews to provide a fixed wing service up and down the east coast of the UK for oil related passengers. They ran a "closed" scheduled service for some of their oil company customers. Bond eventually took on their own fixed wing AOC and operated a mix of owned and leased King Airs.
When Bond won the air ambulance service contract for Scottish Ambulance Service in the early ninetys, the King Air was part of the package. I am not sure if Bond still have their own F/W AOC or if they just sub charter the aircraft from Gama now.
Gama has a London base, details of which can be found on their web site
http://www.gamagroup.com/index.php