This is really only necessary in iPhones because the notification management compared to Android is, to put it simply, years behind.
I recently noticed my boyfriend had literally dozens of notifications from all apps that could only be classified as ads, such as calls to action from deliveroo saying “try this restaurant”, “new deal for this or that”. When I said to him “why don’t you disable those?? You’re getting so much spam on your lockscreen!” It turned out you can’t remove those without completely disabling notifications for the offending app.
So for Deliveroo, Uber Eats, Uber, etc to be any useful at all and let you know where your taxi/dinner is, you have to grant them a free-for-all access to your lockscreen to post whatever they want!
On Android I only get a handful of notifications that I do care about so I don’t really need a summary. Uber Eats is allowed to tell me about the status of my delivery period.
I don’t know how Apple still has such an anti-user permissions model for notifications. Android has had granular control for what, 4 years now maybe?
My take is that best case scenario you’d arrive roughly at the same time you left.
If you have breakfast in London at 8am, then make it to the airport by 8:30, you’re at the gate at 9:30 after one hour of security and controls, and you’ve made it exactly at the time when boarding starts, which usually is 45 minutes before takeoff on most airlines. You take off at 10:15, arrive at 11:45 (which is 6:45 local time), then still have to go through half an hour of border control and getting out of the airport, and then another half an hour to get to the city centre and have a coffee.
You’d still arrive at about 8:30, but I don’t see the whole ordeal taking any less than 5 hours.
I routinely take a 1.5 h flight to visit my family and while I’m a fair bit away from the airport, I don’t think I’ve ever managed to get door-to-door in less than 8 hours. 6 if we are measuring departures lounge to arrivals.