[7][8] Mills joined Conference National side Histon on 30 July 2010 in a season long loan deal,[9] making his debut at home to Altrincham on 9 October 2010 and scoring after coming on as a 90th-minute substitute.

After being released by Peterborough United in the summer of 2012, Mills moved back to his home town of Croydon to join Carshalton Athletic at the start of the 2012–13 Isthmian League Premier Division season.

[7] Used primarily as a striker, and occasionally on the right of a front three, he played 10 games and scored three goals – two in an FA Trophy qualifier against Heybridge Swifts and one against Kingstonian in a 2–1 league defeat.

Mills joined newly promoted Whitehawk in November 2012[7] and helped The Hawks to the Isthmian League Premier Division title in his first season at the Enclosed Ground.

[19][20] Mills scored eight times in the FA Cup in 2015–16,[21] including the opening goal to give Whitehawk the lead in the round 2 replay against Dagenham & Redbridge,[22] televised live on BT Sport on 6 December 2015.