Jack the glad…. farm minister Jack Cunningham took time out of the Commons to open the UKs largest glasshouse in Runcton, West Sussex, on Tuesday. The glasshouse, owned by food group Hazlewood VHB, is capable of growing 100m tomatoes a year. The £7.5m structure covers 9.31ha (23 acres), has a perimeter of one mile, and is 14ft high. It includes 40,000 sheets of glass, 72 miles of heating pipes and a roof weighing about 1000t.