Chinese companies are ramping up shipments to Britain to levels not seen in years, a possible sign that the Asian factory powerhouse is finding export markets unimpeded by high tariffs like those President Donald Trump has imposed. Official data from both nations point to a pick-up in the value of Chinese exports to the UK after the US president slapped hefty duties on products from the world’s second-largest economy before recently reducing them. Exports of small parcels and electronics have jumped in a sign of possible rerouting to avoid the US tariffs.