I am fed up of my father-in-law claiming everything was invented or made in the North East, especially Liverpool. He told me a French singer who came on the radio was from Liverpool, that some bridge in London was designed in Liverpool but brought to London because some “posh git” liked it so much and that various foodstuffs from pot noodles to chocolate were invented in Liverpool. MIL is just as bad. Coatigans were invented in the North East apparently and Uggs 
Is there a name for someone who does this? Needless to say, they live in Liverpool and hate the rest of the country.