At the height of the summer season Glyndebourne’s lawns look bleached. A panorama of pale, straw-like grass, bone Panama hats, white starched shirts, white linen tablecloths and, crowning it all, puffs of white hair. I watch men in mothballed tuxes negotiate the rose garden, unsteady on their feet, and fragile, bird-like women in pearls pushing their husbands’ wheelchairs, as I worry I should intervene.