The <a href="https://en.wikipedia.org/wiki/London_Underground" id="mwoA" rel="mw:WikiLink" title="London Underground">London Underground</a>'s <a href="https://en.wikipedia.org/wiki/Charing_Cross,_Euston_and_Hampstead_Railway" id="mwoQ" rel="mw:WikiLink" title="Charing Cross, Euston and Hampstead Railway">Charing Cross, Euston and Hampstead Railway</a> opens.