Peter Morgan listed the items he would need and strangled Georgina Symonds in a "carefully planned and calmly executed" attack.
A multi-millionaire property developer who brutally strangled his escort girlfriend after learning she had plans to blackmail him has been jailed for life.
Peter Morgan, 54, will spend at least 25 years in prison for murdering Georgina Symonds, 25, at her home in Llanmartin, Newport.
The father-of-two paid the former burlesque dancer up to £10,000 a month and allowed her to live rent-free at his £300,000 bungalow.
But when he discovered she was planning to show his estranged wife and daughters intimate pictures, he strangled her with a homemade ligature.
Newport Crown Court heard an increasingly paranoid Morgan had installed a listening device, disguised as a plug adapter, in the property in November 2015.
On the evening of 10 January he overheard Miss Symonds talking to a lover about blackmailing him, moving to London and returning to escort work.
Multi-millionaire jailed for life for murder of escort girlfriend