Complex sentence: However there will only be a stop at Piccadilly Circus if the Chelsea-Hackney Line is part of the London Underground network and not part of the National Rail network this is the same situation with many stations on the proposed route in Central London.
Split into simpler sentences: However there will only be a stop at Piccadilly Circus if the Chelsea-Hackney Line is part of the London Underground network and not part of the National Rail network. This is the same situation with many stations on the proposed route in Central London.