Complex sentence: The original Laigh Kirk building was located in New Street but, in 1820, due to the ever growing size of its congregation, the Laigh Kirk moved to a new, much larger building on George Street.
Split into simpler sentences: The original Laigh Kirk building was located in New Street. In 1820, due to the ever growing size of its congregation, the Laigh Kirk moved to a new, much larger building on George Street.