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Sprinter Sean Safo-Antwi has been cleared to switch allegiance from Great Britain to Ghana.
The 25-year-old won the 60m at the Glasgow Indoor Grand Prix and finished third at the British Indoor Championships in February.
Long jumper Jazmin Sawyers has been added to the GB squad for the World Indoor Championships in Portland, USA.
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Sawyers won the British Indoor title in Sheffield in Feburary. The World Championships take place from 17 to 20 March.