Five British policemen have resigned after being accused of making racist remarks in an undercover television documentary broadcast on Tuesday night.
Also read: BBC exposes racist UK police
P C Rob Pulling, one of the eight officers featured in BBC One's The Secret Policeman, resigned from North Wales police as a top officer in his force admitted having felt "physically sick" watching the film.
The others were Carl Jones, Tony Lewin and Adrian Harrison of the Greater Manchester police and Steve Salkeld of the Cheshire force.
All five had earlier been suspended.