On 20 May 2020, representatives of the UK and Poland signed a cooperation agreement on the Solidarity Transport Hub (CPK)

The cooperation agreement was signed by Polish deputy infrastructure minister and government commissioner for CPK Marcin Horała and the British ambassador to Poland Jonathan Knott (on behalf of Parliamentary Under-Secretary of State at the Department for International Trade, Graham Stuart). The agreement envisages readiness for cooperation – involving a Polish-British consultation team - on designing airport and rail infrastructure, spatial planning for areas around the airport and issues relating to sustainable development and project digitisation.
The agreement is part of a continuing Polish-British cooperation on the CPK project. In June and September 2019, British Embassy Warsaw hosted workshops that paved the way for initial architectural concepts for the Solidarity Airport. The proposals were submitted by internationally renowned architecture firms Foster+Partners, Chapman Taylor, Zaha Hadid Architects, Grimshaw, Benoy, Pascall+Watson, Woods Bagot, Populous and KPF.
The British aviation sector has much experience and know-how to offer toward planning, designing and building the Solidarity Airport and 1600 km of new railway lines including high-speed lines. Minister Graham Stuart said:
CEO of the Solidarity Transport Hub, Mikołaj Wild, said:
Polish Government Commissioner for the Solidarity Transport Hub, Marcin Horała, said:
