TRAVEL - ROADS: BUCKS - Multiple vehicle accident on M40

M40 Northbound blocked, queueing traffic due to accident, multiple vehicles involved between J3 A40 / A4094 (Loudwater) and J4 A404 / A4010 (High Wycombe Handy Cross Roundabout), congestion on M40 to J2 A355 (Beaconsfield).