Net trade is the total exports minus the total imports.
Influences on net trade balance:
Degree of protectionism: Protectionism is an attempt to prevent domestic producers suffering from competition abroad. Tariffs, quotas and technical barriers are introduced which makes it harder for producers from abroad to sell their goods in the UK.
If there is high protectionism on UK exports in other countries, exports will decrease as it will be harder for UK firms to sell their goods in other countries. If there is high protectionism on imports into the UK, imports will decrease