Relational continuity of care has consistently been associated with improved outcomes for patients as well as greater GP job satisfaction. Systematic reviews have found that higher continuity with a doctor is associated with lower mortality, while more recent evidence suggests continuity may reduce hospital admissions, emergency department attendance, demand for GP appointments and fragmentation of care.

Continuity also contributes to patient trust, professional satisfaction and more personalised decision-making. For patients with multiple long-term conditions, frailty or complex psychosocial needs, continuity can be especially valuable.

Importantly, continuity does not occur by chance. It depends on working patterns that allow relationships to develop over time and on systems that support clinical responsibility, follow-up and knowledge of patients as individuals.

At the same time, continuity has become increasingly difficult to sustain. Rising demand, workforce pressures and growing service complexity have all contributed to more fragmented patterns of care. While evidence suggests that specific interventions may help improve continuity, the effectiveness of individual approaches varies considerably between settings.

This reinforces the importance of local adaptation rather than a single prescribed solution. Practices are best placed to determine which aspects of continuity are most important for their populations and how those can be protected within available resources.

The wider evidence also highlights that continuity should not be viewed in isolation from sustainability. Demand, capacity, workforce availability and organisational resilience all influence a practice's ability to maintain relationship-based care. Sustainable working therefore requires deliberate consideration of how continuity can be preserved alongside the equally important goals of timely access, patient safety and workforce wellbeing.

For practices in Scotland, this suggests that sustainability is not simply about increasing activity. It is about creating the conditions in which high-quality, relationship-based care can flourish despite increasing complexity and demand.