Why has the UK dropped its trial of two alleged China spies?

Prosecutor hinted at lack of backing from Downing Street but legal experts argue prosecution was still possibleAn extraordinary disclosure by Stephen Parkinson, the director of public prosecutions, on Tuesday evening has triggered a political row over who was behind the sudden abandonment of a high-profile espionage case.Two Britons had been accused of acting as spies for China. One of them, Christopher Cash, was a parliamentary researcher for the Conservative backbencher Alicia Kearns, speciali