An interesting observation from Lord Devlin from 1956:
Each jury is a little parliament. The jury sense is the parliamentary sense. I cannot see one dying and the other surviving. The first object of any tyrant in Whitehall would be to make Parliament utterly subservient to his will; and the next to overthrow or diminish trial by jury, for no tyrant could afford to leave a subject’s freedom in the hands of twelve of his countrymen. So that trial by try is more than an instrument of justice and more than one wheel of the constitution; it is the lamp that shows that freedom lives.1
1. Devlin, P. (1956) Trial by Jury, London, Stevens.