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 00:00 and 00:15 on 6 July 2019.
Delay : There are currently delays of 10 minutes against expected traffic.