There's also, I guess, a diminishing return for infrastructure investments in a highly-developed country like the UK, especially when it's much smaller than China.
That said though, it's a shame Heathrow still can't get the extra runway it desperately needs...
It's a shame Heathrow's terminal buildings have been rebuilt in the last 15 years, rather than shut down with an airport in a sensible place constructed to replace it.
The noise of flights landing over London for 17 hours a day, pretty much every 90-120 seconds, is miserable.
That said though, it's a shame Heathrow still can't get the extra runway it desperately needs...