Police in the U.K. have launched an investigation after an ambulance racing to reach Matthew Vaughn's dying mother was allegedly obstructed by a motorist. The Hollywood director's mum, TV producer Kathy Ceaton, collapsed at her home in Oxfordshire, England last Sunday (21Jul13) following a suspected heart attack, and paramedics were unable to save her when they arrived. It has now emerged that one of the ambulances which was dispatched to help Ceaton, 66, was blocked by a driver who refused to move his car to allow the emergency vehicle through and allegedly made rude hand gestures at the crew. Ambulance service chiefs have called for a full investigation and police are now hunting for the driver. A spokesman for the South Central Ambulance Service says, "We have informed Thames Valley Police and are obviously seeking a prosecution for obstructing an emergency vehicle en-route to an emergency." A statement released by Ceaton's family reads, "Kathy Megan Ceaton, beloved mother of Matthew Vaughn and Pasha Saigol died on Sunday, July 21, aged 66 years. Her intelligence, generosity, loyalty and friendship will be missed by many." The producer gave birth to the X-Men: First Class filmmaker following an affair with Hollywood actor Robert Vaughn, but a paternity investigation later found he was fathered by aristocrat George de Vere Drummond. Vaughn is married to supermodel Claudia Schiffer.