Ilford Imaging, the world's biggest black and white film maker, is up for sale. Administrators are to seek a buyer for Ilford's film making division, which employs 740 staff in Cheshire, but warned that job losses were inevitable. The firm, which began life in Ilford, Essex, 125 years ago, has struggled following the rise of popularity of digital cameras, and has built up debts of more than £40m.