Simon Williams presented on three change practitioner groups - public services, transport, and utilities - operating in constrained and regulated environments. Each group identified challenges specific to their sector, such as political complexity, regulatory environments, and rising customer expectations. The public services group published a report highlighting the need for strong leadership, clear communication, and stakeholder engagement. The transport group's report recommended collectively sharing best practices. The utilities group is surveying members' change approaches. Williams concluded that positive change is challenging in highly regulated sectors due to long lead times, complex stakeholders, and public scrutiny.