What is the tariff deal between Britain and the EU after Brexit?

Something like 1/3^rd of British exports used to go to the EU tariff free.  Boris Johnson promised to do Brexit AND keep British goods tariff free.  I never did hear how that worked out.  A quick Google didn’t tell me anything.  You would think paying tariff on 1/3^rd of your exports would hurt and we would be reading screams and cries from the wounded.  I haven’t seen any, yet.