The UK has a weird chicken and egg thing going on. Everything is in London because everything is in London. HS2 is an attempt to break out of that. By developing better rail links across England we allow companies to start moving out of London.
> The idea that HS2 can make Birmingham airport competitive with Heathrow for Londoners is clearly wrong.
But that's not the aim. The aim is that we shouldn't have everyone in the country using Heathrow for all journeys. Currently we have about 80 million people going through Heathrow which is stupid if a chunk of them are only using it to get into the UK.
London doesn't just have Heathrow and Gatwick. London has six international airports.
Heathrow alone at 80m people currently carries the equivalent of Manchester, Edinburgh, Birmingham, Glasgow, and Bristol combined. We urgently need to fix this.