The boyfriend of a business graduate who was found dead inside her burning car was last night charged with conspiracy to murder her.
Rafal Nowak, 31, will appear before magistrates in Bristol today, Avon and Somerset Police said.
Nowak's former partner, Anna Julia Lagwinowicz, 32, appeared in court yesterday to face the same charge.
A police spokeswoman last night said: "Detectives investigating the murder of Catherine Wells-Burr have charged another person with conspiracy to murder. Rafal Nowak, aged 31, will appear at Bristol Magistrates' Court tomorrow.
"A 38-year-old man remains in police custody where he is being questioned."
Earlier yesterday, Lagwinowicz, a Polish national, made a brief appearance before magistrates charged with conspiring together with other persons to murder Miss Wells-Burr between May 1, 2012, and September 13, 2012.
The defendant, of South Street, Taunton, Somerset, was remanded in custody to appear before Bristol Crown Court on October 9.
Miss Wells-Burr's body was discovered by firefighters who had been alerted to the blazing five-door vehicle by passing motorists off the A358 in Ashill shortly before 6.30am on September 12.
Avon and Somerset Police have appealed for witnesses, describing the death as "tragic and brutal".
Miss Wells-Burr, known to friends as 'Caf', lived in Chard, Somerset, with her parents and sister Leanne.
After gaining a first-class degree in business management at Bath Spa University, she went to work as a business analyst for Chard-based Numatic International Ltd, best known for its Henry vacuum cleaners.
Her parents have office posts at the firm where her boyfriend Mr Nowak, 31, also works.
Jayne and Phil Wells-Burr said their daughter was an "amazing, special person" who was excited about starting a new life with her boyfriend.
The university where Miss Wells-Burr graduated last year offered its condolences to her family. "Everyone at Bath Spa University is deeply saddened about the death of graduate Catherine Wells-Burr," a spokesman said.
"Catherine graduated in 2011 with a first class honours degree in business and management and will be fondly remembered by all those here who knew her. Our heartfelt sympathy and sincere condolences are with Catherine's family at this distressing and difficult time."