Mr Neil and Mrs Christine Hamilton are suing the woman who has accused them of sexual assault for libel.
A High Court writ has been issued by the Hamiltons against Ms Nadine Milroy-Sloan.
The move has been confirmed by the Hamiltons' solicitor Mr Michael Coleman.
He said "I am able to confirm that a High Court writ for libel was today issued against Miss Nadine Milroy-Sloan by Mr and Mrs Hamilton and at this time we are in the process of serving court proceedings upon her."
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