This is dartford bridge, the clockwise crossing over the thames on the m25, going the other way is a pair of tunnels. Pretty unimpressive unless you like architecture or you're an engineer. Wierd fact for you tho... If you in thru the tunnel you can get a good mobile signal but no radio. Not that wierd i hear you say. But the bridge is different... You get good radio signals but no mobile signal despite the fact it's high up in the air. The answer... I can only assume the cables absorb mobile signals but amplify radio signals. As for the tunnel? Mobile repeaters? That i have no answer for. Btw in blackwall tunnel you get both. Now that makes dartford even wierder!
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