Judd won a gold medal as a member of the British junior women's team at the 2012 European Cross Country Championships. She began the outdoor season by running 2:01.09 for 800 m in a BMC event. At the British Olympic trials in June, she finished third, ahead of UK number one Marilyn Okoro. Then in July at the 2012 World Junior Championships, she won a silver medal in the 800  m final in 2:00.96, which is a UK age 17 record. She went on to reach the 1500 m final, finishing fifth and smashing her previous personal best, with a time of 4:09.93 which is another UK age 17 best.