After-school Babysitter/Nanny Needed for our child in London-Battersea (starting 5th Sept)

We are in need of an after-school babysitter/nanny (3:30-6:30pm) for our child for 12 months. We need someone near London SW18 who is experienced, flexible (in case we need more hours during school holidays) and reliable. £14-£16 per hour.