Simplify the following text for a Grade 6 native English-speaking person.
Original: It is 145 miles ( 233 km ) from London , 18 miles ( 29 km ) from Sheffield , 26 miles ( 42 km ) from Nottingham and 54 miles ( 87 km ) from Manchester .
Simplified: It is 145 miles ( 233 km ) from London , 18 miles ( 29 km ) from Sheffield and 54 miles ( 87 km ) from Manchester .