The County Borough of Blackburn was, in 1967, the governing body of the Blackburn area. Blackburn is an industrial town in Lancashire, but one that was declining as a result of the cotton industry’s slow fading away. Perhaps it shouldn’t be a surprise, therefore, that in that year, the roads in the borough had 4000 potholes in them – one for every 26 people living in the affected area.
The newspaper story about this incident, extrapolating from these figures, calculated that there must be two million such potholes in Britain’s roads, with 15% of them (300,000) in London. The fact that there are 4000 holes there is probably the single most widely-known fact about Blackburn, although presumably at least some of them have been repaired in the nearly 5 decades since John Lennon drew them to our attention.