Complex sentence: When the line was electrified in 1906 services stopped running beyond Hammersmith to Richmond in the west and was diverted from the ELR to Whitechapel in the east, until the ELR was electrified in 1914 and services ran from Hammersmith to New Cross and New Cross Gate.
Split into simpler sentences: When the line was electrified in 1906 services were withdrawn beyond Hammersmith to Richmond in the west and was diverted from the ELR to Whitechapel in the east. The ELR was electrified in 1914 and services ran from Hammersmith to New Cross and New Cross Gate.