The endless stream of heard-’em-all before puns will pursue AromaScan Plc for the rest of its life as a public company, and they have started already – Investors Sniffy as Aromascan Makes Debut burbles the Reuters headline over an item reporting that shares in the builder of electronic noses made a bumpy debut on London’s Unlisted Securities Market yesterday, initially ring to 105 pence, a 5p premium to the issue price, but fell back toa 2p discount at 98 pence by 1pm.