ACT Foundation

Amazon

American Airlines

Anglian Water

Ardmore

British Airways

BAA Limited

Balfour Beatty

BG Group

Bovis Lend Lease

Basepoint

British Land

BT Group

Buckinghamshire County Council

Building and Construction Authority, Singapore

Bupa

Buro Four

Byrne Group

Cabinet Office

Capgemini

Carillion

Chorus Group

Costain Group

Circle Health Properties Ltd

Durkan Ltd

Essex County Council

Explore Living

Explore Manufacturing

Gatwick Airport Limited

GlaxoSmithKline plc

Global Switch

Graham Construction

Great Western Studios

Heathrow Airport Ltd

Henderson Global Investments

Heron International

Hertfordshire County Council

Highways England

Hinchingbrooke NHS Trust

ICS

Igus

Integrated Building Products

Investec

ISG PLC

Jones Lang LaSalle

KIMS

Kier Group

Laing O'Rourke

Land Securities

London Borough of Barking and Dagenham

London Borough of Bromley

London Borough of Kensington and Chelsea

London Borough of Lewisham

London Borough of Redbridge

London City Airport

London School of Hygiene and Tropical Medicine

Loromah Estates

Lufthansa

Mace Group

Mahle Powertrain

Manchester Airport PLC

Metropolitan Police Service

Moorfields Eye Hospital

Mount Anvil

Ministry of Justice

Ministry of Defence

NG Bailey

North Manchester General Hospital

Norstead

Oxfordshire County Council

Parkview International

PM Properties

Qatari Diar Delancey

RAF

Royal Holloway University of London

Royal Mail

RG Group

Sainsburys

Schneider Electric

SEEDA

SES

Serco

Shangri-La

Shepherd Group

Simons Group

Sir Robert McAlpine

Skanska

SnoozeBox

SPb Renovation

Spie Matthew Hall

Stanhope

Tate Modern

Tesco Stores Ltd

The London Clinic

Three Valleys Water

TRE Global

University College London (UCL)

University of Southampton

Vastint

Vestfold Hospital Trust - Norway

Vinci

Yotel

Lend Lease

Pennine Acute Hospital Trust

Porchester Road Ltd.

St. David's Hotel

St Petersburg University Hospital Medical Complex

Zedzzz

Center for Global Development