An ex-boyfriend of singer Charlotte Church is wanted by police in connection with a substantial heroin haul.
Police are seeking to question Kyle Johnson, 24, over the supply of a "large seizure of Class A drugs", reportedly worth some £20 million.
Johnson, originally from Ely in Cardiff, has been living in Stratford in east London and could still be in the capital, police said.
He is described as light-skinned black, 6ft 1ins of average build with short-shaved black hair and a Welsh accent.
Johnson and Church - who found fame as a child singer and now hosts a chatshow for Channel 4 - dated for around 18 months until splitting in 2005.
Church, 22, recently gave birth to her second child with Welsh rugby star Gavin Henson.