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In under a month, tolls will be introduced for drivers at the new Silvertown Tunnel and the existing Blackwall Tunnel in east London. For car drivers it will cost £8 a day in peak. These are huge changes to London's transport network and awareness seems to be low. The new highly controversial Silvertown Tunnel opens on 7 April. So what do you need to know? Â鶹Éç Radio London's Aaron Paul has the key information. (Image credit: Getty Images)