There are just over 2,000 CAD Operator positions within the MPS, and approximately 400-500 theoretically on duty at any given time. Due to staffing issues stemming from the transfer to the Metcall centres, the numbers are currently much lower, and a number of police officers have been seconded to Central Communications Command to fill vacancies; this removal of officers from active duties led to some controversy. While the Metropolitan Police Authority intended to eventually have all CAD Operator positions filled by civilians, allowing police officers to return to active duties, this civilianisation was stopped in 2010 as it was recognised by the MPS that total civilianisation would create a significant risk to London if the MetCC staff went on strike and police officers (who cannot strike by law) were not trained and familiar with MetCC processes.