London's <a href="https://en.wikipedia.org/wiki/Royal_Festival_Hall" id="mwwA" rel="mw:WikiLink" title="Royal Festival Hall">Royal Festival Hall</a> opens with the <a href="https://en.wikipedia.org/wiki/Festival_of_Britain" id="mwwQ" rel="mw:WikiLink" title="Festival of Britain">Festival of Britain</a>.