According to the official notification of the European Union with regard to the UK withdrawal from the EU, the legislation of the EU, as well as international agreements with other countries, will continue to be applied to the UK during the transition period (from February 1 to December 31, 2020).
Therefore, until the end of the transition period, Uzbekistan will consider the UK as the EU member state in terms of the implementation of all international agreements signed between the Republic of Uzbekistan and the European Union, including the Partnership and Cooperation Agreement of June 21, 1996.