Complex sentence: The 115, which is operated by National Express West Midlands, operates via Aston railway station, Erdington and Walmley and is run to a half hourly Monday-Saturday daytime frequency, which is not combined with the main'Sutton Lines' frequency.
Split into simpler sentences: The 115, which is operated by National Express West Midlands, operates via Aston railway station, Erdington and Walmley. Half hourly Monday-Saturday daytime frequency, which is not combined with the main'Sutton Lines' frequency.