By Lars Mucklejohn The UK’s biggest banks were among FTSE 100 stocks hit by a global sell-off on Monday as investors were spooked by the prospect of a US recession. Major domestic lenders Barclays and Natwest dropped as much as 5.8 per cent and 4.9 per cent. Lloyds Banking Group, which is Britain’s largest mortgage lender and often considered a bellwether for the UK economy, sank as much as 4.5 per cent. The moves come as part of a wider rout in global markets triggered by fears that the world’s largest economy may be headed for a recession, with just three FTSE 100 stocks currently in the gre…