One lane is blocked on the M4 westbound this morning.
The lane is blocked between junction 5, A4 (Langley) and junction 6, A355 (Slough), because of an accident involving a car and a motorbike.
The accident is causing long tailbacks on the M4.
UPDATE: 10.05am: All lanes have been reopened but congestion is back to junction 4 A408 (Heathrow Spur).
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