Temporary Live in Nanny in London

We are looking for a nanny for our clients visiting London.
Family has 3 girls - 6, 9 and 10 years old - the governess will be live in and stay with the family through their the stay . Nanny will be required to sleep in a room with girls.
The hours obviously are waking up with the girls. THe family will be staying in a hotel so helping them get organized, bring them down for breakfast - plan the day walk on the park go to a museum- etc.Mum will be with them - but also there might be times when the nanny will be taking care of the girls on thier own.
In the evening either early dinner or room service at the hotel. And put the girls to bed. There will be no day off and the nanny will be required to work full 9 days.