I have a lovely reliable live-in nanny and I live BTC off Northcote Road. My youngest starts school in September so my nanny will have lots of free time during the day. If you have pre-school children and would like a part time nanny to help you out during school hours 2-3 days per week, that would be really interesting to her. She could also consider doing after school work a couple of days a week if that were interesting to you.
Do get in touch if you would like to discuss. She really is a lovely girl and I trust her totally with my three terrors.