"We've been working on [De Gabay] over the last year in Butetown with the whole community" says National Theatre Wales Artistic Director John McGrath.
"A group of young Somali men came to us asking if we could help them tell their story in a very different way to the way it's usually told".
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The raids took place in Oakley Way in Caldicot and the Somerton area of Newport on Friday, 20 April.
Passengers being urged to check before they travel as upgrading work begins between Cardiff and the Severn Tunnel.
Over 40,000 people in the UK have young onset dementia. One charity says there needs to be more support for people in Wales under 65.