One day a week Nanny wanted in Swiss Cottage

Old clients employing a 4 day a week Nanny through us now require an extra day ( preferably a Friday but could be flexible ) to help care for a darling little boy 1.5 years and his adorable sister 3 years. Sole charge. Hours would be 7.30-5.30. All nursery duties.  No driving required. 

ASAP start. Salary neg.