Fraser Bond are the leading lettings and property management agents for YY London - London E14. YY London at 30 South Colonnade is an office building in Canary Wharf, London E14. The new building designed by Buckley Gray Yeoman will include 408,000 sq ft of the new office, a new façade, café, retail spaces and a rooftop garden. Sustainability The energy demand of the building will be reduced by 62%. Avoiding demolition is estimated to save 10,260 tonne of CO2e - equivalent to planting 51,300 trees (or 1,480 car trips around the equator). The building is targeting environmental standards.