Stop shouting and read the link fully. WTO rules will NOT apply to the EU countries we trade with because......they’re protected by the EU!
If you do read it, you may notice certain information such as:
‘The imposition of tariffs on trade with the EU would increase costs for both UK importers (and hence consumers) and exporters. The average EU tariff rate is low – around 1.5%. However, at a sectoral level, the impacts would be much larger: for example, for cars and car parts the tariff rate is 10%. Since most UKbased car production is exported, and uses imported parts, the impacts would be magnified. The impacts would also be large on agriculture, where EU tariffs and quotas remain high; this would result in significant food price inflation for British consumers.’