Which dog breed is expected to live the longest?

Flat-faced dogs have '40% higher risk of shorter lives than other breeds' 

Which dog breed is expected to live the longest? New study on average life expectancy of dogs

Flat-faced dogs such as pugs and French bulldogs have a 40% increased risk of living shorter lives than other breeds, researchers have said.

A new study suggests the average life expectancy of all dogs in Britain is around 12.5 years, with the Lancashire heeler expected to live the longest at 15.4 years.