M4 fast slip from M4 J4 westbound exit to M4 spur (Heathrow) southbound | Westbound | Congestion
Location : The M4 westbound exit slip at junction J4 for Heathrow.
Reason : Congestion.
Status : Currently Active.
Return To Normal : Normal traffic conditions are expected between 20:00 and 20:15 on 15 August 2019.