Job Vacancy - Anni Dewani, 28, from Sweden, was shot after being kidnapped while in a taxi with her husband Shrien last month.
On Tuesday, taxi driver Zola Tongo told Western Cape High Court he was offered 15,000 rand (£1,400) by Shrien Dewani, 31, from Bristol, to kill his wife. - Lowongan Kerja
Job Indonesia - Mr Dewani was arrested on suspicion of conspiring to murder his wife.
He is due to appear before the City of Westminster Magistrates later, the Metropolitan Police said.
Mr Dewani's family have described the allegations as "totally ludicrous".
Scotland Yard said Mr Dewani, from Westbury-on-Trym, had been arrested in the UK following an extradition request by prosecutors in South Africa.
A spokesperson said he had surrendered himself at a police station in Bristol on Tuesday and was later arrested on suspicion of conspiring to murder his wife.
Taxi driver Tongo was sentenced to 18 years in jail after agreeing a plea bargain.
He was charged with murder, kidnapping, robbery with aggravating circumstances and perverting the course of justice.
Two other people, Xolile Mnguni, 23, and Mziwamadoda Qwabe, 25, face charges of murder, aggravated robbery and kidnapping.
Mrs Dewani was kidnapped while the taxi was travelling through Gugulethu township, near Cape Town on 13 November.
Mr Dewani returned to England after the murder and has always denied any involvement in his wife's death.
The couple are understood to have met when relatives introduced them in England 15 months earlier.