By the terms of an Agreement with the Bristol and North Somerset Company and the principal Colliery Proprietors of the Radstock District, this Company is under engagement to lay the narrow gauge between Radstock and Salisbury on or before 3rd September next ... In view of this obligation, the Directors ... consider that the convenience of the public will be best met, and the interest of the Proprietors best secured, by the alteration from Broad to Narrow Gauge of all the Lines in the district which these railways accommodate.