Sorry, I should have said that there is no legal requirement to train student teachers about dyslexia. Of course, some will get the information that they need as part of their courses. However, many will not (I didn't get any as part of my PGCE).
It seems that no one at my son's school knows anything about dyslexia. The SENCo thought that the DST test couldn't be given until the child was 7 (the age is 6 and 6 months), and then administered a version of the test that had become obsolete in 2004, in which there were about 5 mistakes (both in the scoring and in the administration of the test) giving him a score that was not accurate. He has found school very hard, and has been viewed as naughty and disruptive, because he cannot write, despite the fact that we have a family history of dyslexia, and a letter from both the pediatrician and the the ed Psychologist raising the possibility of dyslexia.
I am glad that some student teachers are getting the training that they need to help and recognise dyslexia in the classroom (after all, dyslexia friendly teaching will help EVERY child in the classroom, not just dyslexics). But we need to make sure that the legal framework is in place to help every student teacher to have the framework in place to help every child. Sure there are other neurological conditions that need addressing too. However, this petition has been set up by the British Dyslexia Association, and obviously, they will campaign for what they know about. Please do read about what they are campaigning for on the petition site, as they put it much better than I can.