OK FOLKS! I emailed her and she replied to me! This is what she said:
Thank you for your concern. In hindsight, I should not have tagged au pair onto my job description as that obviously has a very specific job description and, when we require a traditional au pair, I will happily appoint one under the government guidelines.
I can assure you that our offer of board & lodging in exchange for 22 hours' nanny work per week is based on sound calculations of the difference in pay between live-in & live-out nannies. We have employed live-in nannies, the first was paid £300 per week net (in addition to board & lodging) to look after 1 child full-time (3 years ago). Given that a comparable daily rate for a live-out nanny would have been £100 per day, it would seem a logical conclusion that you could say that live-in nannies work 2 days per week for board & lodging and the other 3 days for standard pay.
We have already successfully had a part-time Spanish nanny on the same conditions as we are currently advertising. She used her 3 free weekdays to do an internship in Central London that resulted in a full-time job after 6 months & allowed her to fulfil her ambition of securing a job in London commensurate with her graduate status.
We do not view ours as a 'classic' au pair job as we do not expect our nanny to be available 5 days a week for our family, as is the case for au pairs, she will be able to take on another part job as our hours will be on only 2-3 days, to be agreed with her. Nor do we expect up to two nights per week babysitting. We need a babysitter only once or twice per month.
We have had more than 50 applications for this position, including many from people who would like to combine it with supply teaching, Masters studies etc. Our position offers excellent value compared to earning the minimum wage: 22 hours' work at minimum wage would pay you £143 per week gross. I would be interested to know if you can find anywhere in a safe, green, pleasant part of London where you can rent a delightful double room, pay all your bills & buy food to last a whole week for £143. Our first nanny was paying £650 PCM to share a grotty house in Hammersmith when her contract finished with us and she decided to live-out and do supply teaching, that was before bills and food expenses.
You might also like to note that organisations such as Workaway view 5 hours' work per day, 5 days a week, as a fair deal in exchange for board & lodging.
We have no intention of being exploitative of our nannies. We are offering a genuine chance to become part of our family and have free time to do another job or pursue studies. We had a very strong field of applicants and a super Kiwi girl will join our family shortly.