 Construction from Brill to Oxford had not yet begun . Further Acts of Parliament were granted in 1892 and 1894 varying the proposed route slightly and allowing for its electrification , but no work was carried out other than some preliminary surveying . On 1 April 1894 , with the proposed extension to Oxford still intended , the O & AT exercised a clause of the 1888 Act and took over the Tramway . Work began on upgrading the line in preparation for the extension . The line from Quainton Road to Brill was relaid with improved rails on transverse sleepers , replacing the original flimsy rails and longitudinal sleepers . At around this time two Manning Wardle locomotives were brought into use . 
