The Water Lily House at Kew Gardens was hot, humid and full of treasure yesterday – a mix of the most delicately coloured water lilies – Nymphaea – and also some with the brightest and richest jewel colours. Bold leaves and bold variegation too – set against black, still water reflecting the Victorian architecture of the glasshouse. A perfect 10 minutes (which happily was enough; can there be 110% humidity?)