A weaker pound benefits UK exporters by making their goods cheaper overseas, boosting export volumes. It allows UK exports to become more competitive on world markets. However, a weak currency can also drive up costs for UK importers and consumers as imported goods become more expensive. Exchange rates are determined by foreign exchange markets and reflect the relative demand and supply of different currencies. A weaker pound means it takes more pounds to purchase the same amount of foreign currency like dollars or euros. This hurts UK importers by increasing their costs.