The four 'mini-prisons' announced by the Ministry of Justice will hold a total of 1,260 prisoners.
Under the plans, the 'houseblocks' will be built at HMPs Parc in Bridgend, Peterborough in Cambridgeshire, The Mount in Hertfordshire and Thameside in London.
Six prisons in England will close, along with sections of three others.
Justice Secretary Chris Grayling says the plans will "bring down the cost" of operating the prison system, with the target of saving £63m annually.
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Cardiff's bus station will close this Saturday after more than 60 years serving bus passengers from across the country and the world.
Not a bad way to end the week! Plenty of sunshine out there to start, with the risk of a few showers in the north and west this afternoon.
Clear skies out there in places have allowed temperatures to tumble. More sheltered rural areas could even see a touch of frost!