Hampshire Constabulary has just updated information regarding a closure of the M3 earlier today following a serious RTC The M3 has now been reopened following the earlier closure of the southbound carriageway at junction 8. They will provide further details on the incident tomorrow, reports from a source said that the incident had involved a lorry and a motorcyclist. The M3 was closed for a number of hours whilst emergency services were at the incident. A full accident investigation is now underway. Hampshire Constabulary has been approached for comment.