Need occasional babysitter for 3 evenings per week in London

I'm looking for a responsible and friendly babysitter to help with my two children, aged 4 and 6, on a few evenings per week. Occasional pickups from afterschool activities would be great, and bedtime routines (bath, stories, lights out) should be straightforward. I value someone patient, energetic, and able to engage the kids with crafts and games. Ideal candidate has a valid DBS check, first aid knowledge, and good references. We prefer someone who can start around early evening and stay for 2–4 hours, with predictable availability in advance.