WORKERS at Holland's Pies celebrated the company's 150th anniversary with a birthday cake -- and a free meal of pie, chips and gravy. The Baxenden-based company, which has a workforce of 500 and is part of the Northern Food Group, produces 75 million pies, puddings and pasties each year. Managing director Graham March. "Our staff are absolutely fantastic and we are very proud to be a real part of Lancashire life."