Police have issued images of a man they want to speak to after a woman was sexually assaulted while attending NASS festival.

The victim, who is 17 years old, was assaulted near the main stage of the NASS festival, sometime between 8.15pm and 9.15pm on Sunday, July 10.

The man is described as around 6ft, of broad/muscular build, in his twenties, and he was wearing a white top and carrying a black bag.

If you recognise this man, please call us on 101 and give the call handler the reference number 5222164040. You can also call the independent charity Crimestoppers on 0800 555 111. They never ask for your name or trace your call.