By Jessica Frank-Keyes Veterans’ minister Johnny Mercer is this week facing a deadline to hand over the names of those who he said told him about alleged special forces murders in Afghanistan. The government minister has been ordered to give the names to the Afghanistan Inquiry or face a potential prison sentence for failing to comply. Mercer gave evidence to the official inquiry last month but did not name the individuals who he said told him about allegations of murder and a cover-up while he was a backbench MP. Inquiry chairman Sir Charles Haddon-Cave gave Mercer until Friday, 5 April, to p…