- 3 updates
A man was arrested on suspicion of causing a serious injury by dangerous driving. He remains in custody at Gablecross Police Station.
One lane on the eastbound carriageway is now re-opened and, it is hoped, that all lanes on both carriageways will be fully re-opened within the hour.
As a result of these collisions, long tailbacks have been caused on the M4 and the A419 at the Commonhead roundabout, Swindon.
Motorists are advised to avoid the area if possible and, advice for any motorists in the area is to remain calm and inside your vehicle.
Anyone with information on this incident is asked to contact Wiltshire Police on 101 or Crimestoppers on 0800 555 111 where information can be left anonymously.
The section of the M4 between junctions 15 and 14 affected by a number of road traffic collisions this morning is due to be fully reopened within the next hour. Wiltshire Police were first alerted to a collision between a car transporter, a car and a van on the M4 shortly before 00.18am.
As a result of this collision, the M4 in both directions was closed between junction 15 and 14 at 00.38am.
Further to this initial collision, a number of other collisions also occurred.
Drivers are being advised that a section of the eastbound carriageway of the M4 at Swindon is totally closed and two lanes of the westbound carriageway are also closed.
Wiltshire Police is investigating after a serious collision between junction 15 and junction 14 shortly after midnight.
The collision, involving a car, a van and a partially-laden car transporter, happened at about 12.20am just over a mile east of junction 15 and resulted in several serious injuries. Drivers are advised to avoid the area if at all possible.
A diversion between junction 15 and 14 is in place for eastbound traffic. The signed diversion is advising drivers leaving the motorway at junction 15 to follow the 'hollow circle' diversion symbol via A419 north towards Swindon, B4192 eastbound towards Hungerford then the A338 to rejoin the M4.