While she was incarcerated in England, numerous plots by English Roman Catholics and foreign agents evolved around her. These plots were frustrated by English agents, but serious alarm was raised concerning the safety of Elizabeth. The Babington plot, which called for the assassination of Elizabeth, was formed to trap Mary. Mary was found guilty of complicity and sentenced to be beheaded. Although reluctant to execute her cousin, Elizabeth gave the order that was carried out at Fotheringhay Castle on 8th February 1587. Mary was buried first at Peterborough; in 1612, after he had ascended the English throne, her son James had her interred in Westminster Abbey.