Peter Helton
Chris Honeysett, an artist and private investigator, in and around Bath, England:

Headcase (2005) [review]

Slim Chance (2006)

Rainstone Fall (2008)

An Inch of Time (2012)

Worthless Remains (2013)

Indelible (2014)

Lock 13 (2017)

Liam McLusky, a detective inspector transferred from Southampton to Bristol, England:

Falling More Slowly (2010)

Four Below (2012)

A Good Way To Go (2014)

Soft Summer Blood (2016)