 HMS Agamemnon was ordered in 1904 and was the first warship built by the William Beardmore and Company 's Dalmuir Naval Construction Works . She was laid down on 15 May 1905 and launched on 23 June 1906 before the dockyards themselves were finished . Her completion was greatly delayed by labour troubles and by the diversion of the 12 @-@ inch ( 305 mm ) guns intended for her to expedite completion of HMS Dreadnought , and she was not finally completed until June 1908 , six months before her sister Lord Nelson . 
