By Shashwat Chauhan and Shristi Achar A (Reuters) -UK’s FTSE 100 closed lower on Monday, with commodity-linked stocks weighing heavy on the index, as global markets watched the rare protests in China against strict COVID-19 restrictions, leaving its economic outlook uncertain. The blue-chip FTSE 100 fell 0.2%, following two weekly gains that lifted the index to its highest levels in more than two months. The more domestically focused FTSE 250 midcaps index dropped 1.3%. Energy stocks were the biggest drags on the FTSE 100, with oil majors BP and Shell down 1% and 0.3%, respectively. Banks and …