Amala Onoura, in her first year at under-17s, has earned an invitation to compete for the Great Britain under-19s against France.
The Eastbourne sprinter impressed selectors finishing fourth behind Olympian Marcia Richardson in the senior 100m while competing for Belgrave Harriers in the British League Jubilee Cup Final at Bedford.
Amala, sixth in her age group at the English Schools' Championships, clocked 12.18sec to equal her personal best.
She anchored Belgrave to victory in the sprint relay.
Crawley under-17s long jumper Matthew Barclay won his event at the Southern Premier League match at Deangate, near Rochester.
Barclay leapt 6.65m. He was second in the 200m in 23.4sec.
Rob Matthews (Worthing) won the under-17s javelin with 49.66m and Tom Stanley (Crawley) triumphed in the under-15s' 400m in 54.9sec.
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