Footballer Adam Johnson has been refused permission to appeal against his conviction and sentence for child sex offences.

The disgraced former England star was jailed in March for six years for engaging in sexual activity with a 15-year-old girl.

The 28-year-old had sought to appeal against his conviction but a spokesman for the Judicial Office said that had been rejected by the Court of Appeal.

They said his "applications for permission to appeal against sentence and conviction were refused. He was notified yesterday (Monday 11 July) and has 14 days to make a renewed application to appeal."

The winger's sister Faye posted a message on Twitter, saying: "Absolutely devastated that the single judge has rejected my brother's appeal against sentence and conviction.

"But I can assure every supporter that it has made me stronger and I will never give up."

Johnson's trial at Bradford Crown Court heard that he had kissed and sexually touched the girl in his Range Rover, in a secluded spot in county Durham.

He was also arrested for possessing extreme pornography, and pre-trial hearings heard that police found medicines in a safe when he was arrested that indicated he may have been suffering from sexually transmitted infections.

Judge Jonathan Rose said that, as a result, he was satisfied the girl had suffered "severe psychological harm" and that Johnson had taken advantage of "a young teenager's adoration of a successful celebrity".

Johnson's sister, who set up an appeal page on Facebook, went on to say in her message: "Also my appeal page has been temporarily removed but will be back up and running very soon with the link to my website.

"Thank you to everyone for your continued support daily it means a lot and keeps me going."