Dunster Authority, which is known as a 'single-purpose' authority, whose purpose is to "conserve and enhance the natural beauty, wildlife and cultural heritage of the National Parks" and "promote opportunities for the understanding and enjoyment of the special qualities of the Parks by the public", including responsibility for the conservation of the historic environment. Dunster is the most populous area of the electoral ward named 'Dunster and Timbercombe'. The ward extends North East to the Bristol Channel and South West to Timberscombe. The total population at the 2011 Census was 1,219. It is also part of the Bridgwater and West Somerset
Dunster Castle including the south-west. In the case of Dunster, Thomas's son George Luttrell was able to convince the authorities to destroy only the medieval defensive walls, rather than the entire castle, leaving Dunster damaged from the recent siege but still habitable; the walls were demolished over 12 days in August 1650 by a team of 300 workmen. The only parts of the medieval walls to survive were the Great Gatehouse and the bases of the two towers in the Lower Ward. George Luttrell died without children, and Dunster Castle passed to his brother Francis, who survived the political turmoil of both