ITV's This Morning was named best daytime programme - its fourth NTA in its history.

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The NTA's report, Falling Drug Use: The Impact of Treatment, stresses that strong leadership would be needed to maintain the downward trend in the number of drug users.

BBC: Heroin and syringe

Mr Hayes said the NTA was handing over a "world-class drug treatment system" to PHE but stressed that investment had to be maintained when management was transferred on 1 April.

BBC: Heroin and syringe

Isa, a cameraman for the Nigerian Television Authority (NTA), was killed in October 2011, and Akogwu, a news reporter with Channels Television, was shot and killed, having covered the Kano bomb blast in January.

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Mr Hayes said that drug-related crime is "significantly down", with the NTA estimating that drug treatment prevented some 4.9 million offences from taking place in 2010-11, by comparing rates of offending before and after treatment.

BBC: Heroin and syringe