The accession of Lady Jane Grey as Queen was engineered by the powerful Duke of Northumberland, President of the King's Council, in the interests of promoting his own dynastic line.

Northumberland persuaded the sickly Edward VI to name Lady Jane Grey as his heir just before his death on 6 July 1553. As one of Henry VIII's great-nieces, the young girl was a genuine claimant to the throne. Northumberland then married his own son, Lord Guilford Dudley, to Lady Jane.

On the death of Edward, Jane assumed the throne and her claim was recognised by the Council on 10 July in London. Despite this, the country rallied to Mary, Catherine of Aragon's daughter and a devout Roman Catholic.

Jane was deposed on 19 July, her own father even abandoning her cause. She had reigned for only nine days and was later executed with her husband in 1554.