Data supporting the impact assessment for proposals to extend the right to request flexible working to all employees. These proposals aim to facilitate the employee-employer information exchange that can increase the availability and take-up of flexible working, provide all employees with the same access to flexible working, and improve the functioning of the labour market. The data analyses of both time-series (e.g. Labour Force Survey) and regular (e.g. Work-life Balance Employee and Employer surveys) datasets.