How do you say in street slang for good morning british?

There isn't really a specific street slang phrase for "good morning" in British English. It's a fairly formal greeting, and slang is usually used in more informal situations.

However, depending on the context, you could use these phrases:

* "Morning!" - This is a very common and informal greeting, especially among friends.

* "Alright?" - This is a general greeting, but can also be used to ask "how are you?"

* "What's up?" - This is a more American slang phrase that's becoming more popular in British English.

* "How's it going?" - Another informal greeting, similar to "alright?"

* "Top of the morning to you!" - A slightly more playful and archaic phrase.

The best way to know which phrase is appropriate is to consider the situation and your relationship with the person you're talking to.