Question: What is the nationality of the actor who played the role of Detective Chief Inspector Tom Barnaby?

Context articles: Midsomer Murders
Orchis Fatalis
Destroying Angel (Midsomer Murders)
Dead in the Water (Midsomer Murders)
Ring Out Your Dead
John Nettles
Second Sight (Midsomer Murders)
Electric Vendetta
Painted in Blood (Midsomer Murders)
Market For Murder

Midsomer Murders is a British television detective drama that has aired on ITV since 1997.
 The show is based on Caroline Graham's "Chief Inspector Barnaby" book series, as originally adapted by Anthony Horowitz.
 The current lead character is DCI John Barnaby (Neil Dudgeon), who works for Causton CID.
 Dudgeon's character is the younger cousin of former lead character DCI Tom Barnaby (John Nettles).
 Dudgeon first appeared as randy gardener Daniel Bolt in the Series 4 episode "Garden of Death".
 Dudgeon permanently joined the show in 2011 following Nettles' departure.
"Orchis Fatalis" is the third episode of the eighth season of British television show "Midsomer Murders" and the thirty-eighth episode overall.
 It stars John Nettles as Detective Chief Inspector Tom Barnaby and John Hopkins as Detective Sergeant Dan Scott.
 It concerns the discovery of a very rare orchid, the yellow roth, and a number of murders seemingly committed in an attempt to acquire it.
Destroying Angel is the second episode of the fourth series of "Midsomer Murders" and the fifteenth episode overall.
 It stars John Nettles as Detective Chief Inspector Tom Barnaby and Daniel Casey as Detective Sergeant Gavin Troy.
Dead in the Water is the second episode of the eighth season of British television show Midsomer Murders and the thirty seventh episode overall.
 It stars John Nettles as Detective Chief Inspector Tom Barnaby and John Hopkins as Detective Sergeant Dan Scott.
 The boating scenes were filmed in Henley, Oxfordshire.
"Ring Out Your Dead" is the second episode of the fifth series of "Midsomer Murders" and the twentieth episode overall.
 It stars John Nettles as Detective Chief Inspector Tom Barnaby and Daniel Casey as Detective Sergeant Gavin Troy.
John Vivian Drummond Nettles, OBE (born 11 October 1943) is a British actor and writer.
 Nettles is perhaps best known for playing the lead roles in the long-running television series "Bergerac" and "Midsomer Murders".
"Second Sight" is the fifth episode of the eighth season of British television show "Midsomer Murders" and the fortieth episode overall.
 It stars John Nettles as Detective Chief Inspector Tom Barnaby and John Hopkins as Detective Sergeant Dan Scott.
Electric Vendetta is the third episode of the fourth season of "Midsomer Murders" and the sixteenth episode overall.
 It stars John Nettles as Detective Chief Inspector Tom Barnaby and Daniel Casey as Detective Sergeant Gavin Troy, where in a long-held grudge of forty years triggers a series of deaths disguised as alien abductions.
Painted in Blood is the third episode of the sixth season of British television show Midsomer Murders and the thirty first episode overall.
 It stars John Nettles as Detective Chief Inspector Tom Barnaby and Daniel Casey as Detective Sergeant Gavin Troy.
"Market For Murder" is the fourth episode of the fifth series of "Midsomer Murders" and the twenty second episode overall.
 It stars John Nettles as Detective Chief Inspector Tom Barnaby and Daniel Casey as Detective Sergeant Gavin Troy.