The Building Safety Regulator (BSR) has opened a call for evidence to inform its review of Part K of the building regulations and its associated statutory guidance, Approved Document K. Part K covers protection from falling, collision and impact in and around buildings, including requirements and guidance relating to stairs, ramps, handrails, guarding, windows, doors, glazing and vehicle barriers. The BSR is seeking evidence on the effectiveness of existing requirements and guidance and areas where greater clarity or further development may be needed. The BSR will assess responses alongside existing research, including recently published studies on stair safety, to identify priorities for further work. The call for evidence does not propose any immediate policy changes, and existing requirements and guidance remain in place. Any future proposals to amend building regulations or statutory guidance will be subject to further consultation. The call for evidence closes on 28 December 2026.