Thames Valley Police (TVP) Thames Valley Police is the largest non-metropolitan police force in the country. It Covers the 2,200 square miles of Berkshire, Buckinghamshire and Oxfordshire and serves a population of 2.1 million. Its property portfolio supports over 8,000 staff including 4,165 police officers, 250 Special Constables, 500 volunteers, 3,150 police staff, and over 500 Police Community Support Officers. Coretex was commissioned to work with the Strategic Manager (Estates) to develop its long term property strategy.