You keep hearing from a lot of people that people from the North are more affable relative to people from the South. For example, they're more likely to strike up a conversation on the bus, say "good morning" to you while waiting for a train and in general are more willing to help out a stranger. While in London, supposedly a lot of commuters avoid eye contact, fail to hold a door open for others or vacate a seat for someone in need (e.g. a pregnant woman)
Is this simply an urban myth or is there some truth to this?