Complex sentence: Bath Spa railway station is the principal railway station serving the city of Bath, in South West England and is operated by Great Western Railway (who also manage the station) as well as South West Trains and CrossCountry.
Split into simpler sentences: Bath Spa railway station is the principal station serving the city of Bath, South West England. The station is currently managed by Great Western Railway, and it is served by trains operated by Great Western Railway, South West Trains and CrossCountry.