Definition: In this task, you need to generate an appropriate title for the given summary of some paragraph. The generated title must be short and should include the main topic of the given text. Your summary should be less than 20 words long.
Input: Police forces in the south-west of England have joined a new National Police Air Service (NPAS) which is replacing local police force helicopters in England and Wales.

Police helicopters in the South West join new service