Mark Gettleson from the Howard League for Penal Reform said the Government's proposals to give ex-prisoners supervision in the community is "an admission that short-term prison sentences are failing".
He added that prisoners are currently "being warehoused in enormous overflowing prisons, rather than being given something useful to do on the outside."
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The 1D star will go ahead with his scheduled performance as per the wishes of his late mother, Johannah Deakin, who passed away on Friday.
Michael Gove admitted he made "mistakes" in his bid for the Tory Party leadership, and Theresa May was right to drop him from her cabinet.
Four people have been killed and at least 12 injured after a cargo train carrying propane-butane derailed and exploded in Bulgaria.