Helen Hynd says the boys will "do their best"

Helen Hynd, mother of Oliver and Sam says she's really happy they're both through to the final.

She said that whatever happens she will be proud of them both.

The brothers have both secured a place in tonight's 400m freestyle final and will be going head to head in the pool later.

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London 2012 Paralympics

The London 2012 Paralympics takes place between 29th August and 9th September. Paralympians from across the world will compete in 20 different sports in the 2012 games