Simplify the following text for a Grade 10 native English-speaking person.
Original: Sebastian Newbold Coe , Baron Coe , KBE ( born 29 September 1956 , and often nicknamed `` Seb Coe '' ) is a former athlete and politician from the United Kingdom .
Simplified: Sebastian Newbold Coe , Baron Coe , KBE ( born 29 September 1956 ) , often known by his nickname Seb Coe , is an English former athlete and politician .