I have only a limited perception of London to form an opinion, and most of that comes from TV. My actual experience of the city is limited to the airport, and influenced by passing through it in the middle of a hot Summer day, when all terminals were crowded, and I nearly missed my connecting flight; or coming back through at the end of a harrowing day as I started the long journey home.
I’ve heard many a story about the chaos that is Heathrow. They didn’t prepare me for it though. A non-functional loop, laughable crowd “control”, and summer “heat”, all combined to create a stressful last leg.