It’s summer opera festival season in the UK—so, are you a Glyndebourne or a Grimeborn person? Country house in Sussex, or a converted factory in east London? Mostly standard repertoire, or an adventurous programme with plenty of contemporary discoveries? Membership advised if you want to attend, or accessible pricing? Picnic on the lawn in the supper interval, or walk round the corner to the finest Turkish kebab joints in town?