Great idea but very unrealistic. Lots of "that would never happen" moments. Why would the gang let an unknown outsider hang around with one of their people, why would the police use a random unskilled canteen worker on a major case and allow her to continue after constantly going against what they ask her to do/not to do. The gang clearly don't trust the girl at all so why do they allow her to go to hotels and be involved with Liam? It's actually ludicrous on so many levels, even more so that most other dramas that make you go "eh??". In summary, if you switch your brain off and just watch it as a bit of popcorn entertainment it's okay, but don't think about it too much (or at all) as it falls apart at every turn!