O n a chilly morning at a Silvertown studio behind London City airport, the sunburst intro to Jimmy Cliff’s The Harder They Come is on repeat. Dancers run through a routine studded with reggae and dancehall moves. “Get high,” commands associate choreographer Neisha-yen Jones with a smile. “Get low!” The ensemble rise and dip. They do the bogle and whine around each other as their watchful director Matthew Xia nods along. They circle Natey Jones who breaks out the opening line: “Well, they tell me of a pie up in the sky.” In the distance, a plane leaves the ground. It’s eight months since The Harder They Come’s full-throttle takeoff at Stratford East, where the musical was so popular that it is now returning for a second run which will also serve as a eulogy for Cliff who died in November .…