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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It will be a sunny day for most, although rather windy. Cloud will increase from the east through the afternoon.
A warm and pleasant evening for many. Clear and cool overnight.
Continuing to be a fine and dry day across the country with lengthy sunny spells.