What to know

• Seven people died following the collision, including two police officersS1
• Five teenagers have been named locally after a fatal collision on the A66 in which two police officers lost their livesS2
• PC Matthew Blades, 37, and PC Tom Clough, 38, were killed when a Volkswagen Passat that was travelling the wrong way down the dual carriageway near Middlesbrough collided with their carS3