The M3 is closed westbound between J4a and J5 in Hampshire. This is due to a serious road traffic collision. Hampshire Police are in attendance. Road users are advised to expect delays on the approach to the closure and allow extra time for their journeys. For more information visit our website at www.trafficengland.com, our travel apps' and our Twitter feed: @HighwaysSEAST or call our Customer Contact Centre on 03001235000.