LONDON 1 September 2011 – INTERXION HOLDING NV, (NYSE: INXN), a leading European provider of carrier-neutral colocation data centre services, today announced that its London data centre has taken another step forward in reducing its carbon footprint by signing up to 100% renewable energy from UK provider SmartestEnergy.

SmartestEnergy is the UK’s leading purchaser and supplier of electricity from independent generators, sourcing all power from renewable energy sources including wind, hydro and biomass, in addition to Good Quality CHP (Combined Heat and Power). Being as transparent as possible was key for Interxion, as SmartestEnergy provides a clear audit trail and also records relevant renewable energy certificates for Renewable Energy Guarantees of Origin (REGO) this was a major factor in Interxion’s decision.

Interxion UK is the latest of Interxion’s data centres to convert to 100% renewable energy as part of an ambitious, ongoing sustainability programme. Interxion already has company-wide measures in place, including a monthly overview of energy-efficiency in all countries, non-negotiable energy efficient components in design engineering requirements, energy metering and energy efficiency measurements available to customers and closed-loop energy and natural cooling wherever practical.

"We are passionate about making our extensive European network of data centres as sustainable as possible, and the changes to our UK energy supply simply reinforce our commitment to the green agenda. We take energy efficiency very seriously and recognise that our customers also do, and we aim to stay ahead of the game when it comes to ongoing political discussions around the reduction of CO2 emissions – working with groups like the Green Grid and the Uptime Institute to set clear standards and best practice within the industry.” said Greg McCulloch, Managing Director UK, Interxion.