In 1473, William Verney was possibly granted, by Edward IV, a Royal licence to crenellate (Fairfield House)

There is insufficient evidence to be certain about this possible licence to crenellate.

William Verney (d. 1489) is said to have had licence c. 1473 to encircle his house at Fairfield with a wall and seven round towers.

Significant later source are;

• Emery, Anthony, 2006, Greater Medieval Houses Vol3 (Cambridge) p569, 695
  Dunning, R.W. (ed), 1992, VCH Somerset Vol6 p140 Ref to S.R.O., D/P/stogs 23/19

More details about licences to crenellate can be found here.

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