Mason Crane is a work in progress for England, says Andy Flower

• England Lions coach backs 21-year-old leg-spinner
• Hampshire player took one wicket in two unofficial A TestsAndy Flower, the England Lions coach, has called for greater patience regarding Mason Crane’s development as a leg-spinner and tipped Jack Leach to make an impact when the Test side tour Sri Lanka in November.England’s second string are 2-0 down in their three-match unofficial Test series against West Indies A following heavy defeats in what Flower describes as &l