Yeah me was wondering too...I did ask her, she said its just bec its her Mum's 3rd visit in UK so she was granted 2yrs visit visa.She is in the middle of a divorce you see, so now she is on her own, renting a flat and can not get a council house yet so she needs to work. So her Mum went here to look after her daughter and until her divorce is settled. Oh well...