A woman in her 40s reported the incident, which allegedly took place on Friday night (21Aug15) on the Hylands Park grounds, to Essex Police on Sunday.

A spokeswoman for the force says, "Officers attended and arrested a suspect on suspicion of rape. He remains in custody being questioned by detectives. Inquiries are ongoing."

A further 41 arrests were made by Essex Police during the weekend (22-23Aug15), for allegations including sexual assault, drug offences and theft.

The music event also takes place in Staffordshire, England, and performers at the 2015 festival included Calvin Harris, Ellie Goulding and Sam Smith.