By Yadarisa Shabong (Reuters) -British catering company Compass Group on Monday agreed to buy rival CH&CO in a deal valuing the Royal Opera House caterer at 475 million pounds ($603.73 million), including debt, marking its biggest acquisition in Europe to date. Compass, the world’s largest catering group, has been looking to make bolt-on acquisitions as it bounces back from the pandemic. CH&CO, backed by private equity group Equistone, provides catering services to businesses, universities, sports and other events. Some of the venues it serves include London’s Royal Opera House, Abbey Road Stu…