Have a look here: https://oec.world/en/profile/country/gbr/ https://oec.world/en/profile/country/gbr/ It shows November 2020 car exports as £2.4B (= $3.3B). I

Have a look here: https://oec.world/en/profile/country/gbr/ https://oec.world/en/profile/country/gbr/ It shows November 2020 car exports as £2.4B (= $3.3B). In 2018 total car exports was $43.4B = ~$3.6B/month. Judging from this I'd say Brexit had a huge impact, but it's admittedly a limited dataset.