Julian Jessop, analyst at Standard Chartered bank, said: 'These crises could hit us in two ways. Firstly, they could pull down a major British or European bank exposed in the troubled region, sending shock waves through our markets. Secondly, they could make sterling a safe-haven currency, thus pushing its value higher and strangling exports.' Peter Dixon, economist at Commerzbank, said: 'Latin America is the biggest worry. Spanish banks are heavily exposed - their problems could become our problems.'