Multi-coloured butterflies flit across the grass at Canary Wharf - one of a series of 18 art installations that are bringing a glow to winter evenings in east London. On the Wings of Freedom is the work of Aether and Hemera who say the butterflies are symbols of change, creativity and joy. Viewers can interact with them by using mobile phones to change the lighting effects.
The Winter Lights Festival is free and runs until Jan 22, 2016. The installations are best seen between 4 and 9pm. There's a brochure with locations and descriptions at