He was clutching a carrier bag containing a 123 gram block of cannabis resin with a street value of £500. Inside the prison it would have been worth three times that figure, Southwark crown court heard. He also had a Diet Pepsi bottle which was 97 per cent full of whisky with just a small amount of cola to colour the liquid, and stuck to the outside of the bottle were 28 tablets of insomnia drug Zopiclone. The prescription-only medicine, sold in the UK as Zimovane, "heightens euphoria when ingested together with alcohol" and is known to addicts as "zim-zims", said Andrew Mazibrada, prosecuting.