What to know

• Pc Matthew Blades, 37, and Pc Tom Clough, 38, were killed when a Volkswagen Passat hit their marked armed response vehicle.S1
• Makai Saddington, 18, was one of five men in the VW Passat which sped the wrong direction down the A66 in Teesside, killing two police officersS2
• PC Matthew Blades, 37, and PC Tom Clough, 38, died when a car driving the wrong way on a dual carriageway crashed into their vehicleS3