In the 1990s, we worked closely with BT to design and deliver Five Brindleyplace. The building incorporates reduced floor loadings, an upflow air conditioning system with heat recovery, openable windows (not oversized) and energy saving lighting and controls. Making these choices saved money. This encouraged BT to adopt new ways of working and informed the environmental sustainability brief for subsequent BT buildings at Edinburgh and Brentwood.

At Piccadilly Place we are looking to achieve a BREEAM 'Excellent' rating for all of our future offices.

At King's Cross we aim to go further still. We are working to achieve a 5% target reduction in carbon emissions, over and above what Building Regulations require; as they tighten, so will our target.

We will achieve further carbon savings through the installation of distributed CHP/energy centres, using the heat generated to provide cooling for buildings and achieve tri-generation. We plan to incorporate the use of biofuels, once the supply chain is reliable and cost-effective.

We will also include at least one fuel cell, roof-mounted wind turbines, photovoltaics, ground source heat pumps and solar thermal systems for generating hot water. Together, these measures are likely to reduce carbon emissions from buildings by some 40%, compared with 'business as usual' industry benchmarks.