 The NPOIU was based in London, either at Scotland Yard, or on the 5th Floor of Tintagel House on the bank of the River Thames.The unit has a staff of 60-70 officers and police staff, seconded from other forces, and has had its budget more than doubled in four years from £2.6 million in 2005/06 to £5.7 million in 2009/10.The unit is led by an officer of the rank of Detective Superintendent, as of 2006 this was Maria Smith of the Wiltshire Constabulary.