Just come from Dover to Potters Bar, Dartford Crossing closed north bound accident. Tail backs on m25/m2 gridlock on all roads around Dartford / Balckwall tunnel tailback to Bexley. A journey which even with op stack took us 1 1/2 hrs down to Dover and 4 hrs going north. Need to build a bridge/ tunnel linking m11 and m2. I hate driving in UK.