Their son, Darren, harms himself and can be violent. And near their home in Scotland, there's no programs that can help. So he's in an institution in Birmingham, 300 miles each way from his parents. His parents blame vaccinations for his autism.

Because of Darren's unpredictable behaviour, when they do make the expensive journey his family, which also includes step-mother Joan, 48, brother Paul, 20 and sister Heather, nine, cannot be sure they will be able to see him.

And if he is having a good day it is too far for them to travel for a quick, unplanned visit.

Paul said: "This new place is ideal for him and there is a programme to try and help Darren - but that's years we have been waiting for help and now he's got to go to another country for it."

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