interesting how selective you are when it comes to external events. We had a global financial crisis in 2008 which the UK weathered better than many economies. Sadly the Tory government squandered that.
Like most other developed countries, income and productivity growth has been very slow in the UK since the financial crisis of 2008–09. But on a per person basis, economic growth has been slower than in the US, the EU27 and Germany in that time. The slowdown has been particularly stark given that the UK economy, and its productivity, were growing quite quickly prior to 2008. While employment growth has been strong, average earnings growth has been dreadful - for which read almost non-existent. Gross Domestic Product per head is today nearly £11,000 lower than it would have been had pre crisis trends continued.
Much of that slowdown is a result of international factors well outside the control of any government: the fallout from the financial crisis, Covid, the energy price spike. But low investment, policy mistakes, political instability, and Brexit, have combined to hold back growth by more than in many comparable nations.
https://ifs.org.uk/publications/conservatives-and-economy-2010-24