Motorway gantry sign
A gantry spanning the motorway with blue overhead signs indicating one lane exiting and the other lane continuing ahead, and the following text.
Left lane destinations: M25s ; (M3, M23, M20); Heathrow [Airport symbol]; (Terminal 5) ; Gatwick [Airport symbol].
Right lane destinations: M25n ; Watford (M1); Oxford (M40).
Change Route: M25 Gatwick or M25 Watford
The two-lane sliproad runs alongside the M4 for a little while before splitting in two, offering you a choice of directions on the M25.