Police have renewed their appeal for information exactly a week after a woman and her son were tragically killed in a crash on the Sheppey Crossing.

Deborah Roberts, 42, and her son Marshall, eight, died after their Renault Clio was in a crash with a white pick-up van last Tuesday.

Her other son, six, was taken to hospital with minor injuries.

The family lived in Sheerness and Marshall went to Rose Street Primary School in the town.

A driver has been released on bail until September 18 on suspicion of causing death by dangerous driving.

Senior investigating officer, Sgt Chris Wade from the Kent Police Serious Collision Investigation Unit, said: "This was a tragic incident and we continue to work to ensure we have the full picture of the circumstances that led to the collision.

"We have had a number of witnesses come forward, for which I am grateful.

"However, there are a number of comments on news websites and social media from people who purported to have witnessed the incident and I am appealing for those people to make contact with us too.

"Anybody with information is asked to call 01622 798538."

A petition, called Make a Sheppey Bridge Safe to Cross, has been launched.

By today it already had nearly 3,000 signatures.