Dear Non-English Mother
If your son has spent all his life in this country, apart from one term abroad, then I don't think it will make a great deal of difference. You say he is bilingual, but it wouldn't surprise me if he speaks - and certainly writes - English much better than he does your native language.
It's worth a mention, however, and together with the family circumstances you describe, it might just be enough to bridge the gap between 117 and 121, so I don't think your headteacher should be reluctant to support you on these grounds.
Like so many of the other cases being discussed at the moment, the outcome will depend much more on the strength of the academic
evidence that will be put forward. You need to be able to prove that under "normal circumstances" your son would have achieved a qualifying score.
If you haven't already done so, have a look at section B24 on the following page:
http://www.elevenplusexams.co.uk/11plus ... nswers.php
One thing missing from my list, that could be used as evidence, would be good school reports, especially
if they indicate very high
achievement. (Unfortunately some school reports these days hardly mention achievement
, as if it's politically incorrect to do so!