Here’s the twist: if you cross at 10pm and then immediately cross back before 6am? Both crossings are free. Yes—you can do a U-turn at the Dartford services and get a round trip for nothing. But you’ll probably look suspicious to the cameras. (I don’t recommend this unless you enjoy explaining yourself to bored traffic cops.)
Also, remember that 6am deadline is sharp. You can’t cheat by entering at 5:59am and taking two minutes to cross—the system clocks the exact moment your number plate passes the camera. So if you’re cruising at 5:59am and it ticks over to 6:00am mid-crossing? You’re paying. Set an alarm. Check your phone’s time. Do the indecisive dance at the roundabout.
In conclusion: yes, the Dartford Crossing is free after 10pm. Drive through with a smug grin, save your £2.50, and tell your friends you’re a night-driving genius. Just don’t ask me about the QE2 Bridge in the fog—that’s a story for another, much spookier, article.
