BUILDING Plastics Holdings, the holding company for entrepreneur Brian Kennedy's window manufacturing empire, has breached its banking covenants and is in ongoing talks with lenders over its debt pile of more than £30m.The company, whose 26 subsidiaries include Macclesfield-based window frame maker Spectus Systems, Latium Management Systems, Clitheroe-based conservatories maker Ultraframe and Everest, has just filed accounts for the year to December 31, 2008 which show a pre-tax loss of of £13.3m on sales of £......for the full story register now for free or login below...