Dairy Crest has posted a leap of 29% in full year pre-tax profit as its Unigate acquisition delivered £11m of synergy benefits. Key brands Clover, Cathedral City, Frijj and Yoplait all recorded double digit growth and built market share. Chief executive John Houliston said Dairy Crest would invest £41m in upgrading its Davidstow unit in Cornwall to make it the UK's leading mature cheddar creamery. It plans to establish its Cathedral City brand as the market leader in mature cheddar, investing heavily in marketing activity. For the year to March 31 pre-tax profit climbed to £73.7m from £57m last year, on turnover up 5% to £1.37bn. {{NEWS }}