[happymellon]

Because the UK really doesn't do regional airports. If they did it would help, but basically I dont have many option outside of the London three or Manchester.

Funnelling everyone through such a small number sounds efficient for the airport, but isn't from a travellers perspective. Heathrow and Gatwick, are massive.

[Jakob]

I haven’t been to UK airports, but often I find one of the more prominent bottleneck to be central checks per terminal instead of distributed checks at each gate like they happen at more efficient airports. The latter is a major improvement: You can directly go to the gate and bag checks happen there.