 Lambrigg ground frame , 660 yards ( 600 m ) south @-@ west of the accident site , controls two crossovers , each one comprising two sets of points allowing trains to cross from one running line to the other in emergencies or during track maintenance work . These points are used only occasionally , operated locally after a release is obtained from Carlisle power signal box . They are normally locked in the main line " running " position . Early statements by Chief Superintendent Martyn Ripley of British Transport Police suggested that investigations would focus on these points . 
