Smart Motorway gantry sign
A gantry structure spanning the motorway with electronic signals, blue signs showing the left lane exiting and three others continuing ahead, and the following text.
Exit destinations: A2w [Hollow circle diversion symbol] ; London (SE & C); Bexleyheath; A2e [Solid square diversion symbol] ; Canterbury (M2); Dartford (A225).
Forward destinations: Dartford Crossing (A282); Stansted [Airport symbol] (M11) (M1) M25 .
Junction number: 2.
The sign says M25 straight ahead, but there's not much of it left. Once all the sliproads from the A2 finish merging in the M25 will have ended and we'll be on the A282.