Unlike the EU and the US, the UK doesn't have any major car companies anymore, so there's less of an incentive for them to apply tariffs on Chinese imports.
(And before the inevitable “but Chinese subsidies” comment - update your talking points, subsidies no longer happens to any meaningful degree)
Actually somewhat surprised we still even have legacy auto in top 10.
Also, take a look at the reports on the knock on effects on suppliers of the JLR hack.