liam linford oliver-christie , 29 , whose father is the former olympic sprinter , was caught with the drugs under his floorboards during a police raid in west kensington , west london .
officers uncovered the haul and ` drugs paraphernalia ' with the help of a sniffer dog at his council flat in september 2013 that isleworth crown court in middlesex was told today that the drugs cache included 14.1 g -lrb- 0.50 oz -rrb- of cocaine of up to 40 per cent purity .