When you arrive at the car park, park your car in one of the designated drop-off bays and unload your luggage. Check in with reception and hand over your keys. A transfer bus takes around 10-15 minutes to reach Terminals 2 & 3, running every 15-20 minutes. From there, simply catch the Heathrow Express train to T4 from Heathrow Central Station. It takes around 20 minutes. Exit M4 at Junction 4 Use the left lane to take the A408 exit to Uxbridge Keep left and continue straight to Stockley Road/A408 for 0.4 miles At the roundabout take the 1st exit and stay on Stockley Road/A408 for 1 mile (Go through two roundabouts) At the lights, continue straight on to Trout Road for 0.1 miles and Drivefly Park & Ride will be signposted on your left hand side.