ESTA, the Energy Services and Technology Association, is the UK’s leading Energy Management industry association. ESTA focuses on demand-side energy management and efficiency across all sectors and operations including buildings, processes and transport. Energy consumption and cost are the primary considerations but ESTA also considers the positive impact of energy management measures on security of energy supply to organisations’ sites, the advantages in terms of reputation of responsible corporate citizenship and the legal requirement to meet legislation and regulation. ESTA members’ activities span the lifetime energy management of organisations including concept, design, construction, operation, maintenance, refurbishment and updates. ESTA has over 100 members who supply products, systems and services supporting all aspects of Energy Management and in particular measurement, control and management.