Complex sentence: Much of National CNDs historical archive is at the "Modern Records Centre" at the University of Warwick and the London School of Economics, although records of local and regional groups are spread throughout the country in public and private collections.
Split into simpler sentences: Much of National CNDs historical archive is at the London School of Economics and the "Modern Records Centre" at the University of Warwick. Records of local and regional groups are spread throughout the country in public and private collections.