More than 10,000 people have signed a petition on the No 10 website calling for the whole charge - increased from £1 to £1.50 last month - to be scrapped. But there are fears the cash toll for a car or light van to use the bridge or tunnels - the only crossing in the Thames Gateway - could rise further. Critics say the pre-Budget report reveals work has been commissioned to "realise value for the taxpayer" at the crossing. They describe the discount scheme for local residents, which applies to those living 20km away in Thurrock and Dartford but excludes nearby Bexley and Havering, as unfair.