The following season saw Dover Athletic clinch the Isthmian League Premier Division title with the help of Collin's 21 goals and he extended his stay at Dover in May 2009 by signing another contract with the Kent club.
In the subsequent campaign, Dover Athletic triumphed in the Isthmian League Premier Division under Collin's influence of 21 goals, and he renewed his commitment to the club by agreeing to a new contract in May 2009.