VANDALS have struck again at a Bideford waste management business highlighted only last week because of the number of arson attacks on its premises.Four scrap cars were severely damaged by fire on Thursday night at PWM Waste Management in Old Barnstaple Road. A portable building used as a canteen by workers was smashed up, with windows broken and kitchen equipment thrown into a nearby stream.Only last week the Gazette reported on a fire which destroyed offices at the premises.Director Julian Rolfe said that was the eighth attack on the business in two years and these events were threatening the business and the jobs of its 10 workers.Thursday night's attack came when they were still struggling to come back from the previous fire, he said. "It's a nightmare."But they were lucky that it was not worse as this was right beside one of their main buildings where they had created a new office, said Mr Rolfe.Now they would be appointing a night watchman, he said. And until then they would have to mount watch over the premises themselves.Fire officer Neil Blackburn this incident was being treated as arson, with three separate seats of fire."There has been a history of issues at this site, with break-ins and arsons," he said.Bideford Police Inspector Sean Kenneally said an investigation was taking place and he appealed for anyone with information to contact them on (08452 777444) or via the Crimestoppers line (0800 555111) quoting reference CD\/08\/351.