London's exporter-heavy FTSE 100 inched lower on Monday as oil majors and Asia-exposed financials fell on China growth worries and as the pound strengthened, while a 72% slump in Tullow Oil single-handedly dragged down midcaps.

London's FTSE 250 was 0.41% lower at 20,846.51 in afternoon trade on Monday, with Tullow Oil leading the index downward.