By Patrick Hill Alexei Navalny’s mother was yesterday told she could not see his body after flying 1,200 miles to the scene of his mystery death. Lyudmila, 69, was turned away at the morgue in Siberia as her son’s aides accused Vladimir Putin of hiding his corpse to cover up his murder. The Russian dictator’s most prominent critic was declared dead on Friday at the penal colony where he had been serving 30 years on trumped-up charges. His spokeswoman Kira Yarmysh claimed: “We know for sure that it wasn’t just a death – it was a murder. “They are trying to cover traces, this is why they are not…