Based on 1988 D&H Games Spectrum release.

[1] The dongle supplied with the UK release of CRICKET CAPTAIN by D&H Games must be inserted in joystick port 1 before booting the game disk. The dongle may only be removed during the game if practice mode for 2 players is selected, but must be re-inserted before choosing any other game option. Please note that the CDS release of the game contained no such copy protection dongle.