Kent-based international drug traffickers have been jailed after £4.3 million worth of meth was intercepted on its way to Australia. Kevin Filkins, from Sevenoaks, and Robert Hamilton, of Orpington, have been sent to prison for their roles in the operation. Yvonne Stewart, 55, from Croydon, has also been locked up. This came after 24kg of crystal meth was seized by the Australian border force and police who established that the shipment had come from the UK. An investigation launched in January last year by the Organised Crime Partnership (OCP) – a joint National Crime Agency and Met Police un…