Laura, looking for a nanny in Summertown

I'm a friendly mother in Oxford with a 4 year old girl and a 5 year old boy. We are currently based in Summertown, Oxford.
We are looking for some after school help starting end April - working 2 or 3 days per week. Also some ad hoc eve babysitting.
The job would be to play with the kids at our house, do some simple reading practise, make a simple healthy dinner for them. My husband and I both have to work and we are looking for a friendly, fun, person who has experience with children, and can help take care of our children for a few hours each day, keep them safe and play with them until we finish work.
Thank you!