Caitlin McNamara says she will appeal the Crown Prosecution Service’s decision not to pursue Sheikh Nahyan bin Mubarak Al Nahyan for the alleged attack in Abu Dhabi

The British woman who accused a United Arab Emirates senior royal of sexually assaulting her has vowed to fight on after the Crown Prosecution Service declined to prosecute him last month, saying that the CPS decision sends “a clear message to this man and those committing similar crimes that as long as they’re of economic value to the UK, they can do whatever they want”.

Caitlin McNamara, who was the curator of the first Hay festival in Abu Dhabi in February, went public with her accusations last month. She alleges that Sheikh Nahyan bin Mubarak Al Nahyan, the UAE’s minister of tolerance, had attacked her shortly before the festival, which his department had funded. McNamara had believed she would be attending a business meeting with the royal, who denies the allegations through a London lawyer: “Our client is surprised and saddened by this allegation, which arrives eight months after the alleged incident and via a national newspaper. The account is denied.”