Although this is English National Opera’s first production of HMS Pinafore, it has a long and proud tradition of performing works by Gilbert and Sullivan. It is, however, a deceptively difficult task for a major opera house to pull off their creations because it is so easy for any production to fall either side of the tightrope it inevitably walks. On the one hand, these operettas require energy and so it is always a risk that top professionals in their pursuit of excellence will...