A third man has been arrested on suspicion of the kidnapping a 50-year-old man in Lincolnshire.
Two men, including the spokesman for South Holland and Deepings MP John Hayes, have previously been charged with kidnapping the man on 30 January.
The 40-year-old man was arrested in his home town of Hastings, East Sussex, on Wednesday and taken to Spalding police station.
Two women, aged 37 and 47, have also been charged with kidnapping.
Craig Jackson, 39, of Wharf Street, Spalding, agent and spokesman for John Hayes MP, is charged with kidnapping with Andrew Sayer, 39, of Moons Green, Spalding.
Angela Skeels, 37, of the Wash and Tope hotel, Hunstanton, and Gina Page, 47, of Estuary Close, Kings Lynn, Norfolk, are also charged with kidnapping.
Mr Jackson was remanded into custody at Lincoln Crown Court on 9 February and the other three were granted bail until a plea and case management hearing on 26 April.
He is also charged, with Ms Skeels and Ms Page, of perverting the course of justice and possession of cannabis.