Saunders admitted both murders at a hearing in December 2016.

The court heard Miss Morgan and Saunders were in a relationship between June 2014 until July 2015. By the June of that year they got back together but neither told their families.

In 2016, when Saunders was studying accountancy at college and Miss Morgan was working at Matalan, she met Mr Simmons.

They began dating in July 2016 and Miss Morgan told Saunders their relationship was not working, the court heard

When Miss Morgan told Saunders their relationship was over, he accused her of cheating and said: "I will kill whoever it is."

He began searching for revenge online and, days later, sent Miss Morgan a photograph of the back of her house.

The aspiring sportsman told Miss Morgan that he had threatened to kill Mr Simmons on Facebook and "smash his head in".

Mrs Justice Davies said: "Your mother describes you as having struggled to come to terms with the breakup of your relationship with Zoe.

"Following the split in July 2015 she states that you have been in and out of depression, although you never sought medical attention.

"She described how when you were down or depressed you would stay awake all night and she would hear you.