Looking for adhoc childcare options

I work on a freelance basis and am looking for someone to look after my two daughters after school from September. I can usually give a week's notice for the days needed which are about one or two afternoons a week.

It would involve collecting them from school (in ED) and giving them dinner. We are walking distance from the school so no need to drive.

I'm looking for someone fun, friendly, conscientious and reliable. Recommendations preferred please.

Many thanks

Anna