What is London slang for 250 pounds?

There isn't a single, widely accepted slang term for £250 in London. Slang is often fluid and depends on the specific context and group.

However, here are some possibilities:

* "Two-fifty" is the most straightforward and likely understood option.

* "Two-fiddy" is a slightly more informal variation.

* "A couple of hundred and a half" is a more descriptive way to say it.

It's also possible that you might hear more specific slang depending on the context, like "a score and a half" (referencing £20 being a "score") or something related to the item being purchased.

Ultimately, the best way to understand London slang for £250 is to listen to how people use it in conversation.