John Beaufort, Marquess of Dorset and "Earl of Dorset", courtesy titles granted to the Beaufort heir-apparent or heir-presumptive. These titles were not recognized by King Edward IV, of the House of York. John had been in exile since 1461, first in Burgundy and then France. When Henry VI of Lancaster reclaimed the throne in October 1470, John returned with his brother Edmund. But a few months later, Henry was driven from the throne again, and the Lancastrians were on the run. John was killed in the Battle of Tewkesbury on 4 May 1471, while fighting beside Edmund, who was captured and beheaded two days later.
Edmund Beaufort (died 1471) due to occasional insanity she assisted in his duties, Somerset was unenthusiastic over the reconciliation and made little effort to co-operate. In fact his failure to hold London against Edward IV was a decisive moment, leading to the Battle of Barnet (14 April 1471) and the death of Warwick. Some sources say he was present at Barnet, but this is an error. Fleeing west towards Wales to seek help from Jasper Tudor, but halted by the Yorkist army at the Battle of Tewkesbury (4 May 1471), he commanded the van of the Lancastrian army at the battle. His position was