Nahki Wells scored for the third successive game to inspire Bradford City to a 4-0 victory over his former club Carlisle United in League One.The 23-year-old, who was released by Carlisle in 2011, grabbed City’s second goal after capitalising on a weak defensive header.Mark Yeates, James Hanson and Gary Jones were also on target for the Bantams at Valley Parade.Wells, who scored against Bristol City last weekend and Huddersfield Town in midweek, was substituted in the 83rd minute.