Need a Trustworthy Babysitter for 2 Children in London W2 area

We are looking for a nurturing, responsible Spanish speaking after school babysitter / nanny to look after 2 children (9y and 5y). We would like someone with a few years experience and references and who lives locally preferably. The minimum hours are 20h per week (5 days a week) with some additional full time days during inset days and half term if possible. Possibility to extend the hours per week to 22h. Thank you for considering this opportunity. We hope to hear from you soon.
Marion