I have just ordered both of these as i seem to remember when it was on TV it was absolutely brilliant. £2.99 for a series can't be bad. See the below description of the series:
Investigative reporter Donal MacIntyre delves into the murky waters of Britain's underworld for a round of powerful observational films on some of the country's most infamous criminals.
Spending months at a time immersed in their world, MacIntyre explores the day-to-day lives of some of Britain's most feared and dangerous gangsters. In contrast with the undercover investigations he has carried out in the past, MacIntyre does not set out to expose criminals in this series. Instead, he delivers an honest and thought-provoking insight into a world that few see and even fewer are prepared to admit exists.