M4 spur (Heathrow) southbound between M4 and J4A | Southbound | Congestion

January 18, 2026 - 5:54 pm Last updated January 18, 2026 - 6:13 pm

Location : The M4 SPUR southbound between junctions J4 and J4A . Reason : Congestion. Status : Currently Active. Return To Normal : Normal traffic conditions are expected between 18:15 and 18:30 on 18 January 2026. Delay : There are currently delays of 10 minutes against expected traffic.