Sanji’s real life accent in The Live Action?

In The Live Action, Sanji speaks with a posh South London accent. However, I've never heard anyone from London speak like that, and it seems more suited for TV. In real life, Sanji's actor, Taz Skylar, uses Multicultural London English (MLE), which is more common and is a the inner city vibe of London. When speaking Spanish, he speaks with a Canary Islands accent like in The Live Action, as well. While I think this accent suits Sanji in the series, I don't think a posh South London accent exists in reality, as I have never heard anyone speaking like that!