Au pair

We're a spanish family with 3 daughters aged 11,9 and 7 years old. Next year we want to move to UK and we'd like to have an English native au pair from September2015 to June2016. Requirements: who likes children, and is friendly and reliable and talks in English with them. She'd wake up the girls at 8, give them breakfast and bring them to school at 9. Then pick them up at 14 and give them the meal until 15,30 or 16,00. Free weekends. We live near the train station(30 min to Sol) and very near to University UAM, 1 min to the State School of Languages. Some evenings I could need some help with the kids. We offer as a host family, with a single bedroom with wc. Payment depending of the hours a week under the European Convention on Au pairs. URGENT, to begin in September.