Yes, that sort of local. I'm not talking about kilometers, or even a whole airport. Something like 100m³ should be achievable without too much trouble.

I don't really want to link it to avoid linking this username to things, but I guess this should be okay: http:// rp dot delaat dot net/2017-2018/p95/report.pdf

There's actually only two "international" civilian airports in London.

London City, and London Heathrow.

Luton, Stansted, and Gatwick are "London" in name only. All about 30mins drive from the M25.

I can reach Gatwick in 30 mins from West London using an Oyster. That's faster than my commute into the City. So it's London, for all intents and purposes.

Isn't London City the only airport actually in London? See e.g. https://www.telegraph.co.uk/travel/news/heathrow-and-gatwick...

Heathrow and Gatwick are about the same distance from London City Airport.