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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A windy day, with rain gradually spreading from the south-west further into the rest of the country.
A man and two teenagers have been arrested after a man was stabbed to death in Rhyl in the early hours of this morning.
It will be a dry night with clear spells for all of us, but the south-easterly wind will increase, becoming rather windy by morning.