The genre came from London Garage..which is that like 2 step drum pattern I love so much. It gets your head noddin, seems slow, but its really at like 140 bpm.
And also DnB like you said, plus Grime...which is sort of London's version of in your face hip hop.
I think an influence like DnB might scare away a lot of people cause DnB is mainly so basic and makes you feel like a machine or somethin listenin to it..
I'd say the structure of the songs with the bass being the main focus of the song resemble DnB but definately not the four to the floor type drum patterns that DnB abuses so much.
Also I've been doin a little bit with the genre you can check me out in my sig.