Enlarging Battersea
I think you will find that all avenues of expansion were explored whilst Battersea was in the hands of the dreaded Egyptian Grocer. Any extension of the platform into the river was subject to Port of London Authority approval which was certain not to be forthcoming. This coupled with the "jobsworth" attitude of our friends in the Aerodrome Standards department at Gatwick means that what you see is what you are stuck with.