UK'North-South' population drift accelerated during the 1980s.
Deindustrialisation of northern cities e.g Liverpool and Sheffield triggered exodus of many young people towards the UK's economic core of London and the South East.
Since the period of deindustrialisation in the 1980s, this trend of migration has continued.
2019: London's population reached a record high of 9 million.
London house prices have tripled in value since 1995 as a result of high demand from incomers and investors.
Since 1945, gap between house prices in northern and southern England has grown and lessened several times.
Rising cost of doing business in London have sometimes triggered out-migration of people and businesses.
Cardiff and Bristol offer attractive alternative to London.
The BBC relocated to Manchester in 2011.
London's global hub status means the UK's core-periphery imbalance is likely to persist.