Trying to find name of U.K. TV drama?

Hi! I’m trying to find the name of a U.K. drama that was on about 5 or so years ago.

The most memorable scene from the drama was when someone was hiding in the boot of a BMW car, in the void between the back seat and the boot, and then shoots one of the passengers when they get in the seat. This happens near a quarry 

The other thing I remember is that the husband was in prison and his wife was on the outside and there was money laundering involved.

Oh and the son of the guy in prison has a relationship with an Indian / Muslim girl.

That’s all I can remember. Odd things I know! 

Any ideas? 

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