Howitt has already parted company with sales and marketing director Mike Normyle and finance director Chris Knight this year (PrintWeek, 19 June).
Progress with the Equator project has slowed down in recent months, but the firm has denied that it is on hold. Last month Howitt said there were still a number of issues to be finalised, including an essential rail link and Regional Selective Assistance grant (PrintWeek, 25 September).