It is amazing what fine performances you can get beamed to your computer these days. Slightly less amazing is the packaging these events come in, when they do. ENO relayed free a concert of Mozart’s Requiem, but it was preceded by a snatch of Strictly, with a row of muscular young guys ripping off their shirts, before we entered the Coliseum for a heavily pregnant Danielle de Niese hyping the event we were about to see and hear.