When Henry died, Catherine married Thomas Seymour but the marriage was short lived as Catherine died shortly after giving birth to her child. Thomas Seymour proposed that Jane marry Henry’s son Edward, however his brother Edward Seymour Duke of Somerset who was regent
to the young King wanted Edward to marry Elizabeth daughter of Henry II of France. In the event both Seymours feel from power and were executed by John Dudley the Duke of Northumberland. Jane was then offered to Northumberland’s son Lord Guildford Dudley whom she was reluctant to marry until forced to do so by her mother.
The Dudleys were prominent among the new Protestant nobles who had done well out of the closing of the Catholic monasteries, and when Edward became sickly they feared the prospect of Henry’s catholic daughter Mary becoming queen and restoring Catholicism. Under pressure from Northumberland Edward’s will was changed to include Lady Jane Grey as his Protestant heir. Edward died on 6 July 1553 and Northumberland had Lady Jane Grey proclaimed as Queen of England on 10 July 1553. She refused to name her husband Guildford Dudley as king.
However within nine days Mary had gathered sufficient support to triumphantly ride into London and Parliament proclaimed her Queen Mary I. Jane and her husband were accused of treason and sentenced to death; however Mary spared them and allowed them to live in the Tower of London. In January 1554 there was a Protestant rebellion led by Thomas Wyatt calling for Jane’s restoration. The rebellion failed and Mary was pressed to sign the death warrant. Both Jane and Guildford Dudley were executed on 12 February 1554.