Complex sentence: Eventually after prolonged campaigns by the supporters of the different proposals, a Parliamentary Committee of enquiry recommended the adoption of the Rennie direct route, and an Act for the construction of the London and Brighton Railway was passed in July 1837.
Split into simpler sentences: Eventually after prolonged campaigns by the supporters of the different proposals, a Parliamentary Committee of enquiry recommended the adoption of the Rennie direct route. An Act for the construction of the London and Brighton Railway was passed in July 1837.