The Ministry of Virtue - S14-E6
Continuity mistake: Around the middle of the episode, Hart and Carmichael walk down a street with ice cream cones in their hands. When they stop for a brief face to face discussion, the ice cream in the man's hand keep changing from full portion to half-eaten and vice versa as the camera perspective switches back and forth.
Answer: It's certainly a personal choice about using one, and probably similar to how some people refuse to wear a helmet or forego other safety equipment. Most bells and horns on bikes are not very loud and probably wouldn't be heard in busy traffic, making them mostly ineffective. Murdoch would likely still yell, even if he had a bell or horn.
raywest ★