Karen, if you do complain you may want to refer to other boroughs in Essex who ensure as far as possible that email results and postal votes are received at the same time. This is the case for Redbridge, although I don't think that they say what time the results will be sent out via email - just give the date. The info below is from our transfer to secondary school handbook.
"you will receive an email with your offer details on 2 March 2007 - if you submitted your application online.
1st March 2007 letters posted first class to parents/carers with single offer of a secondary school, including the outcome of Redbridge selection tests, if applicable."