* Hello
* Hi
* Good morning/afternoon/evening
However, Londoners might be more likely to use informal greetings like "Alright?" or "How's it going?"
It's worth noting that the way someone greets you in London might depend on:
* The situation: A formal setting might require a more formal greeting like "Good morning, sir/madam."
* Your relationship: You might use "Hey" or "Hiya" with friends but use a more formal greeting with someone you don't know well.
* The individual's personality: Some people are naturally more formal, while others are more casual.
Ultimately, the best way to greet someone in London is to be polite and respectful.