The other free movement agreement while the UK obeys EU free movement rules called
Kolpak contracts

Quote:
Kolpak contracts, which have been used since 2004 in English cricket, are named after Slovak
handball player Marius Kolpak, won a landmark case at the European Court of Justice in 2003.

They allow sportsmen from countries with associate trade agreements with the EU, such as South Africa,
Zimbabwe and Caribbean nations, to be afforded the same right to free movement as EU citizens.

Kolpak players are not classed as overseas players by the ECB under the terms of their contracts, but they
become ineligible to represent their country at international level.

BBC News Sport - Kolpak: Abbot expects ECB to resolve eligibility issue