Rain has its uses after all. For photographers, puddles can lead to shots like the mind-boggling image of the Hayward Gallery above.
It's not just rain water that leads to beautiful reflections though. Clusters of glass in the City offer rich opportunities as demonstrated by tonybill, whose three images take their sense of drama from reflecting London landmarks.
All photos by Londonist Flickr pool contributors: tony bill, worldoflard, jordi.martorell, bradman334, Cybermyth13, richwat2011, Ascottony2 and peterphotographic.