Jonathan Stroud (also the author of Lockwood and Co - made into a single season on Netflix) has just completed a British Post-Apocalypse trilogy.
After an undefined Great Cataclysm, Britain is divided into seven Kingdoms. Most of the people live in the highly regulated Surviving Towns, under the watchful eye of the Faith Houses who ensure orthodoxy, both behavoral and genetic.The map of Britain is both familiar and different. Between the Surviving Towns are the wilds, infested with a whole range of nasty and deadly fauna, including The Tainted (think Rage Infected).
Scarlett McCain is a young robber, who specialises in robbing banks, and occasionally Faith Houses. She is deadly accurate with a revolver and has no hesitation in using it.
The figure is from the Gunfighters II by Great Escape Games with a Stargrave head.