Motorway gantry sign
A gantry spanning the motorway with blue overhead signs indicating one lane exiting and three continuing ahead, and the following text.
Left lane destinations: M3 Basingstoke; Southampton; Richmond .
Right-hand three lanes destinations: Heathrow [Airport symbol] M4, Watford M1; Staines A30 M25 .
Junction number: 12.
The real world version of this sign is quite battered and faded, and "Richmond" is on a cover plate, replacing the original destination of "London". If you're heading to London from here you're better off aiming for the M4.