Shares in Allied Leisure plunged 13% as it warned of poor trading at its tenpin bowling business. The group blamed the distraction of Euro 2000 and the disruption caused by the merger of its Superbowl acquisition and its original bowling estate. Allied added that its video and gaming machines continue to underperform, but that its two most recent acquisitions, American pool bar operator Rileys and snooker bar outfit Waterfall are trading satisfactorily. Although Allied plans to dispose of the bars and discos that accompanied recent acquisitions, the uncertainty that this is creating in these outlets has affected performances. Its Burger King franchise is trading ahead of expectations.