(Credit: Tristram Kenton/Royal Opera House) Double-crossing, licentiousness, and the sad demise of a once popular showman: that was all going on down the road in Westminster while the Royal Opera House revived Damiano Michieletto’s double bill of “Cavalleria rusticana” and “Pagliacci.” Sightings of former prime minister Theresa May and former Johnson ally Michael Gove – himself ignominiously sacked by Johson {…}