Today we go inside Operation Titan, as North Yorkshire Police fight back against county lines drugs gangs. But with each line the police shut down, another pops up in its place, sometimes within days. The Sunday Times' northern editor David Collins investigates how to break the cycle.

This is episode two of a five-part special investigation into county lines drug dealing, running in audio, video, print and digital from The Times and The Sunday Times.

This podcast was brought to you thanks to the support of readers of The Times and The Sunday Times. Subscribe today: http://thetimes.com/thestory

Read more: Drug dealers use anti-slavery law to escape prosecution | I was a county lines drug runner. I tried to quit, then I was stabbed

Watch: School-age kingpins: why children now hold the key to county lines

Host: David Collins.

Producers: Kate Lamble and Taryn Siegel

Executive producers: Tim Walklate and Dan Box

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INVESTIGATION: On the line - the never-ending battle

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