Disley Tunnel
... that when the Disley Tunnel was constructed, the navvies used 24 simultaneous working faces?
... that when the <b id="mwGQY"><a href="./Disley_Tunnel" id="mwGQc" rel="mw:WikiLink" title="Disley Tunnel">Disley Tunnel</a></b> was constructed, the <a class="mw-redirect" href="./Navvies" id="mwGQg" rel="mw:WikiLink" title="Navvies">navvies</a> used 24 simultaneous working faces?