(Reuters) -The UK government is preparing to step in and temporarily run Russian gas giant Gazprom’s British retail supply arm, Bloomberg News reported on Monday, as companies cut ties with Russian businesses. Officials are closely monitoring the situation at Gazprom Marketing & Trading Retail Ltd, whose ultimate parent is Russian state-run Gazprom, Bloomberg reported. The unit, operating as Gazprom Energy, supplies just over a fifth of Britain’s commercial gas volume and serves thousands of customers including the National Health Service. The company is a prime candidate to be taken into the …