Simplify the following text for a Grade 7 native English-speaking person.
Original: It is located on the north side of Euston Road in St Pancras , London ( between Euston railway station and St Pancras railway station ) and has a document storage center and reading room at Boston Spa , Wetherby in West Yorkshire .
Simplified: It is on the north side of Euston Road in St Pancras , London , between Euston railway station and St Pancras railway station .