Whitstable’s goalscoring midweek trialist has already done enough to impress boss Jamie Coyle. The Oystermen were edged out by last season’s Southern Counties East Premier Division champions Deal on Tuesday, losing 2-1 to a stoppage-time goal. Their scorer has been offered terms with Whitstable, having linked-up well with summer recruit Jerson Dos Santos in the first pre-season friendly. “He has been doing really well in training,” said Coyle. “He’ll be signing this week. “It was actually a well-worked goal. Jerson Dos Santos was outstanding throughout the game – he played as a No.9. He was a …