The Attorney General’s bid to change the sentence of Valdo Calocane is set to be considered by the Court of Appeal. Calocane was given an indefinite hospital order for the manslaughter by reason of diminished responsibility of Barnaby Webber, Grace O’Malley-Kumar and Ian Coates, and the attempted murder of three others in Nottingham last June. The 32-year-old’s pleas were accepted by prosecutors in January after medical evidence showed he has paranoid schizophrenia. Attorney General Victoria Prentis referred the sentence to the Court of Appeal in February, claiming it was “unduly lenient”. Cal…