The A303 has been closed to traffic following a serious collision earlier today which resulted in one person becoming trapped in their vehicle. Emergency services rushed to the scene to provide assistance and manage the situation. Drivers in the vicinity are urged to avoid the area to allow emergency workers to operate safely and to ease congestion. Authorities are currently investigating the cause of the crash, and no further details about the condition of the individual involved have been released at this time. Updates will be provided as more information becomes available.