The success of Toyota's car-making plant in Derbyshire, one of two in Europe which wil move to triple shift working in early 2004, is helping safeguard more than 700 jobs at its North Wales engine plant, the site's manager, John Burton, said. Announcing the introduction of a new diesel engine at the Deeside plant which will go into Corolla models from early next month, he said it would now lift total engine assembly at Deeside to more than 400,000 units a year.