In a statement, the police said: “During the assault the staff member was punched to the back of the head and nose leading to them sustaining a minor injury.

“The suspect, a male, was subsequently arrested for assault and has since been released while police continue to investigate.”

Anyone who may have seen this or who has any information is asked to contact the police on 612612 or the independent charity Crimestoppers anonymously on 0800 555 111 or via their anonymous online form.