Bromley presided over the trials of a number of those implicated in Wyatt's rebellion. On 17 April 1554 Sir Nicholas Throckmorton and others were indicted for a plot and treason at Baynard's Castle on 23 November 1553, and for a rising and march towards London with Sir Henry Isley and two thousand men. Bromley presided at the trial, and allowed the prisoner such unusual freedom of speech as to provoke complaints from the queen's attorney, and threats of retiring from the prosecution. Yet Bromley was not throughout impartial, but even refused the prisoner leave to call a witness, though he was in court, and denied him inspection of a statute on which he relied. His summing up was so defective, 'for want of memory or goodwill,' that the prisoner supplied its defects, as if he had been an uninterested spectator. Yet the prisoner was acquitted: so much to Mary's annoyance that the jury were punished for their verdict. Foss comments that "Sir Thomas Bromley cannot escape from the charge of undue severity, though probably he was complained of at the time for giving too great license to the prisoner."