Moving Children / emigrating - town or country?

[Aliski]

Due to the economic situation in Greece my cousin is moving to England with her two children (9 & 13). I want her to live with me and my daughter until she and her husband can find a jobs and a house to rent and send the kids to school in Sussex, she wants to send the eldest to a Greek School in Wood Green London as she thinks it will be less traumatic a change. So are the kids better off at a Greek School in North London or at a normal English school in the Sussex countryside, where I can take them horseriding at the weekends and go on picnics - yes I am a country girl and totally biased!

I think I'd want my kids immersed in a local school. Do they plan to go back to Greece very soon, if they were only in UK a short while, a year or so, then I'd consider a Greek school.
I doubt it's much like one their used to anyway. Sort of like the American schools in other countries or the British schools abroad they are a token of the country and do exams for the country the represent.