For those M25 travelling westbound (towards Heathrow), National Highways advises individuals to continue north on the A3, leave the M25 at Junction nine, follow the A243 towards Malden Rushett and Chessington (approximately 5.3 miles), at the Hook Junction turn left onto the A309 Kingston Bypass and continue to the Scilly Isles Junction with the A307 (approximately 2.1 miles), then take first exit to the A307 towards Esher and Cobham to the Between Streets Junction (approximately 4.5 miles), at the junction of the A307 Portsmouth Road take the second exit to the A245 and head towards Painshill Junction and join the A3 north (approximately 0.6 miles).
For those on the M25 travelling westbound (towards Heathrow), National Highways advises drivers to continue south on the A3, leave at Junction nine taking the first exit and follow the A24 Leatherhead Bypass south to the Givons Grove junction with the A246 (approximately 3.6 miles), at the Givons Grove roundabout junction with the A246 take the second exit to the A246 Leatherhead Road toward Guildford to the Clandon Crossroads (approximately 8.5 miles), at the Clandon Crossroads take the right turn to the A247 Clandon Road and then access the A3 South at the Send Junction (approximately 2.1 miles).
National Highways advises individuals travelling towards Gatwick, to continue north or south on the A3, then leave the M25 at Junction 11, follow the A320 towards the Six Crossroads roundabout junction with the A245 Woking, (approximately 3.6 miles), take the A245 to Sheerwater, West Byfleet and Byfleet (approximately 5.7 miles) to join the A3 north or south at the Painshill Junction.
The first closure will take place from Friday, March 7 at 9pm to Monday, March 10 at 6am (between Junction 10 and 11) and the second closure will take place from Friday, March 21 at 9pm to Monday, March 24 at 6am (the same stretch as the previous closure).
British Airways has warned travellers that there may be severe disruptions due to the M25 and A3 closures next month, and in April, due to planned road closures and is advising passengers to allow extra time to head to Gatwick and Heathrow airports.
