The UK Justice Secretary, Chris Grayling, says the prison which will be built in north Wales will be 'Britain's biggest'.
He says the announcement is a very important part of upgrading Britain's prisons.
More top news
A full-time carer from Port Talbot is celebrating after winning £1m on the EuroMillions.
Kane Wannell jailed for holding up a Post Office with a fake gun and pointing it at the owner and customer.
Outbreaks of mostly light rain will arrive from the north tonight with hill fog likely.