Complex sentence: Ironstone is quarried at Pitsford and was formerly transported by rail; the railway line is now part of the preserved Northampton & Lamport Railway which has its headquarters at Pitsford and Brampton railway station.
Split into simpler sentences: Ironstone is quarried at Pitsford and was formerly transported by rail. The railway line is now part of the preserved Northampton & Lamport Railway which has its headquarters at Pitsford and Brampton railway station.