Prosecutors are to run special hubs to carry out initial case processing as they move to streamline operations amid a growing workload.

The Crown Office and Procurator Fiscal Service or COPFS announced plans for a first such centre by April 2015 as it unveiled its strategic plan for the next three years.

Despite falling crime, the Crown has got busier in recent years as prosecutors take on increasingly difficult matters such as sex offences and cold case homicides a

The body has responded - like much of the rest of the justice system - by promising progress on digitalising its work.

Last year it said its prosecutors would be able to use tablets in court.

It has also developed teams of specialist prosecutors for crime such as rape and wildlife crime.

Crown Agent Catherine Dyer, in the strategic plan published on Monday, suggested initial case processing should also amount to a specialist, ensuring consistency

She said: "Current plans are to move to centralised management of this work from April 2015, while consideration is being given to transferring this work to one or more centralised hubs over the course of the plan period."

Ms Dyer also suggested that a national High Court function could be organised by the end of 2018, depending on developments elsewhere in the justice system.

She said: "Our workload has been increasing over recent years, with reports received increasing by 5% since 2009-2010 to 303,221.

"The nature of the cases being reported to us has changed, with our

receiving more complex cases, such as sexual offences cases, which require more investigation and more resources to prosecute than other

types of cases.

"This trend is shown by the increased numbers of cases going to trial."