 Tamworth had a strong start in 2010–11; they were again in a play-off position by late September 2010, and by the time Mills had left the club they were 12th in the Conference Premier.With a compensation package agreed Mills left Tamworth after being appointed the manager of fellow Conference Premier club York City on 13 October 2010.He replaced Martin Foyle, who resigned the previous month, and at the time of his appointment York were 16th in the table.