Seeking long-term babysitter for consistent after-school help

I'm looking for a reliable babysitter to provide long-term after-school care for two children, aged 4 and 7. The role would include picking them up from school, helping with homework, preparing a light snack, and ensuring they have a calm dinner routine. I value punctuality, a friendly demeanor, and experience with children in this age range. Availability should be weekday afternoons, with occasional date nights on weekends. A valid DBS check (or willingness to obtain one) is preferred, along with references. We are located in [City], UK, and would like someone who can start within the next two weeks and be flexible for occasional longer days during holidays.