With its smiling face logo and tempting offer to buy five and get the sixth free, this loyalty card at first appears as innocuous as those offered by any High Street coffee shop or supermarket.
But, it is being handed out to wealthy cocaine users to boost sales and loyalty and reveals just how fierce competition between drug dealers fighting turfs wars for ‘market dominance’ has become.
Last night, drug campaigners warned that the emergence of such loyalty cards shows how middle-class cocaine users were fuelling violence - including knife and gun crime between gangs - on city streets throughout the country.
The card, obtained exclusively by The Daily Telegraph, appears to have been carefully designed...