Francois Fillon won the Republican Party's nomination after a strong debate performance.

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Francois Fillon served as prime minister under Nicolas Sarkozy from 2007 to 2012

He wants to end the 35-hour work week and has vowed to be tough on unions

CNN  — 

He’s been called the “French Thatcher” for his apparent admiration of Britain’s “Iron Lady” and willingness to tackle the unions.

On Sunday, Francois Fillon clinched the Republican party’s presidential nomination, having beaten his closest rival Alain Juppe in a second-round vote.