The reason that Britain has stagnated is the same reason most of western Europe has stagnated (in that GDP per capita hasn't increased for around a decade): con

The reason that Britain has stagnated is the same reason most of western Europe has stagnated (in that GDP per capita hasn't increased for around a decade): continuously increasing debt and an aging population. It's a classic empirical economic result that a high enough level of government debt leads to reduced growth rates, and it's also well-known that growth rates decrease as the average age of the population increases. Over the past couple decades the UK population has been getting older and older on average and the national debt has been getting higher and higher.