Initially the system, known as PredPol, was received skeptically by some senior police officers who were uncertain of how academic research and data might work in real-life crime fighting.

But similar schemes have also been piloted in Kent, Great Manchester , West Yorkshire and the West Midlands with promising results.

In Medway, Kent, the scheme was credited with causing a six per cent fall in street violence over a four-month trial last winter.

Meanwhile in Manchester, burglary fell nine per cent between May 2010 and May 2011 but in Trafford, where predictive policing was used, the drop was nearly three times that at 26 per cent.

And results from Leeds and showed similarly impressive results.

Professor Shane Johnson of UCL's department for security and crime science said the most important element in the system was the fact the crime hotspots constantly change.

He said: 'The risk of crime is higher in some places than others but does not occur in even the riskiest places all the time, and sometimes occurs in low-risk neighborhoods.

'The challenge of pinpointing when crimes will occur at particular locations is the aim of predicting policing - it's no longer possible to throw overtime at problems.

'The police have got to work a bit smarter.'

Predictive policing originated in America and is based on the principle of drawing conclusions based on the large scale analysis of criminal behavior.

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