It's on the North side of Snowsfields. That recess in the middle is where the Commercial Bins SHOULD* be stored. Somehow the bins are over the road on Guinness Trust property, prior to that they were on the corner of Snowsfields Primary School. 

*See Plan - A_PL_100 - GENERAL ARRANGEMENT PLANS - GROUND FLOOR http://planbuild.southwark.gov.uk/documents/?GetDocument=%7b%7b%7b!VuVrEYMwRnPT3igsrlBAzw%3d%3d!%7d%7d%7d or search Southwark Planning for case 13-AP-3059