By Mikey Smith David Cameron’s vague explanation of why it’s OK for the UK to keep selling arms to Israel is “not good enough,” Labour ’s Shadow Defence Secretary has said. John Healey said Lord Cameron should publish a summary of the legal advice he relied on to green light more weapons sales, saying it was “essential that Britain abides by international law.” Mr Healey spoke to the Mirror during a visit with Labour leader Keir Starmer to the BAE Systems submarine manufacturing plant in Barrow-in-Furness. It’s the first time a Labour leader has visited the facility in 30 years – and the pair …