(Reuters) - London's stock markets surged back into the black on Friday, as investors eyed fresh government support for companies facing financial strain in the wake of the coronavirus pandemic.The blue-chip FTSE 100 jumped 2.7%, with shares in Holiday Inn owner IHG soaring 8.9% after it announced a series of measures to cut costs and ride out the worldwide shutdowns and travel restrictions.Travel stocks including Easyjet and Carnvival Corp also rose.Finance minister Rishi Sunak is set to..