Our family has moved to France a little over a year ago, at the time my eldest was 6 (he was born in England, both us parents are French, but our son's English at the time was much stronger than his French (through Nursery first, then reception year and year 1 at a CoE school). Having moved abroad, and despite attending a bilingual programme aimed at native English speakers, our son's level has been steadily declining in reading -especially common words for is age group - and in writing : he can no longer connect sounds and graphics. He does not have any condition that would lead to developing reading/writing disorder (we've investigated that avenue) and we have kept a strong link with England and the English language through regular contact with our friends back in the UK, TV and films in English only, native English afterschool babysitters, meetups with English speaking and bilingual families and myself speaking English to him most of the time at home. Despite long hours spent on his English homework (on top of the equally demanding French curriculum), his dad and I feel more and more helpless at the decline of his first language which is part of his identity (he always says 'I am English!'). Sorry that is a long (desperate) message from a mum who would like to know whether other mums have had the same experience after moving abroad, and how they coped with this.
Thanks.