I don't understand some of the bad reviews here. This series was great fun. It's supposed to be a caricature of criminal life in East London transplanted to the Costa. It's not aiming to be an accurate depiction. It takes inspiration from some real-life characters from the underworld, in 1980s London, and then makes them OTT to great effect.
The main characters are well-acted, particularly Ma and Cindy, and Jason Flemyng does his great scene-chewing piece. It's beautifully shot, with some great camera angles and use of natural light and colour. The recreation of the 80s, in the clothes, cars and gadgets is top notch.
And to opt it all off, the soundtrack is a fantastic tour through the great music of the 80s, with songs well-chosen for the scenes in which they're used. Having characters sing along with the lyrics is very funny too!
Well worth a watch. Accept it for what it is meant to be!