In January 2007, he signed a loan with English club Leeds United. who were battling relegation in the Championship. He signed for the remainder of the 2006–07 Football League season, with an option for Leeds to buy him at a fixed transfer fee at the end of the season. Ankergren established himself as a firm favourite with the Leeds fans and displaced Neil Sullivan, Tony Warner and Graham Stack, putting in a number of matchwinning saves and performances. His popularity was further increased during the 1–0 victory over Luton Town when he made his second save from a penalty kick since joining Leeds. An injury temporarily forced him out of the team with another Leeds loanee goalkeeper Graham Stack taking his place, although Ankergen reclaimed his place in the team once he regained match fitness. He soon made it publicly known that he wanted to continue his stay at Leeds past his loan spell, and Leeds' manager Dennis Wise stated he wanted to keep Ankergen at the club.