These tariffs will be applicable to all imports to the UK, if there are no exceptions such as trade agreements, tariff suspensions or unilateral preferences for developing countries.
On January 31, 2020, the UK ceased to be an EU Member State, and since then, the UK does not take part in the EU decision making process. However, the UK is bound by EU rules including the EU customs Union and the EU Single Market during the transition period. The aforementioned tariffs will be applicable after the end of the transition period, on January 1, 2021, unless an extension is agreed before July 1, 2020.
The consultation on tariffs is open until March 5, 2020.