Complex sentence: The Settle and Carlisle line diverges a few miles to the north of the derailment site, so was not obstructed and remained available for diversions, however that route is not electrified, so unsuitable for many of the services that would otherwise use the WCML.
Split into simpler sentences: The Settle and Carlisle line diverges a few miles to the north of the derailment site, so was not obstructed and remained available for diversions. However, that route is not electrified so it is unsuitable for many of the services that would otherwise use the WCML.