I am interested in finding a nanny for a newborn for a few hours per week in Knightsbridge. I was wondering where should I look for one and what (typical) qualifications should I expect her to have (and of course how I can check them). I was thinking of calling an agency but I am not sure if they will be able to send me the same nanny every time I need one, which is really important. I should also note that I am not sure which days and hours I will need her so I need a nanny which I will be able to notify (that I need her) a day or two earlier. Also, does anyone know how much do they charge? Thank you!