Lieutenant of the Tower of London in 1424 during the reign of Henry VI. During the reign of Edward IV, Richard Haute (died 8 April 1487) was Lieutenant from 1471 to 1473. John de Vere, 13th Earl of Oxford was Constable in the reign of Henry VII, at which time Sir John Digby was his Lieutenant. According to some sources, in the reign of Henry VIII Sir Thomas Lovell (died 25 May 1524) served as Lieutenant from Michaelmas 1512; however according to other sources, he was Constable of the Tower. Among the prisoners of state in Lovell's custody was the Pretender to the Crown, Lambert Simnel.
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