It's Abstract Thursday!

This morning we had breakfast with our friends and managed to spend the next couple of hours chatting, by which time we needed to leave for lunch which they had booked at a delightful pub nearby.  After lunch it was time for us to hit the road and set out for home.  This journey is one that involves the Dart Charge.  On the way there we go over the rather splendid Queen Elizabeth II bridge but the return journey is through the Dartford Tunnel, which features as my fairly abstract offering today.
Many thanks to our regular host Ingeborg.