Babysitter (νταντά) για ένα παιδί ηλικίας 7 ετών, Lambeth

Hello, we are looking for a native Greek-speaking babysitter for our daughter Elsa. She is almost 15 months old.
We would like someone who covers the Streatham area for babysitting duties. It will initially be on an ad hoc basis, for a few hours on some evenings when both myself & my husband will be out.
From November, there is a strong possibility we will require someone to do a whole day (8am - 6pm) on Fridays; for 6 weeks.
The main requirement is that the person is Greek and Greek is their native language. I am Greek so I'm already trying to teach my daughter Greek so she is bilingual.
We look forward to meeting you!
Many thanks
Natasha, Gavin & Elsa