A delay of approximately 20 months in seeking leave to appeal against sentence, with an unconvincing explanation and proposed grounds lacking any real prospect of success, will not warrant an extension of time. Additional medical material that was available but not relied on at plea will not be admitted on appeal unless it is sufficiently compelling to demonstrate a miscarriage of justice, and material that merely adds marginally to a comprehensive body of evidence already before the sentencing judge will not meet that threshold.
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