No the gauges were the same standard. Only the Great Western Railway (Brunel's railway) used a broader qauge and once he was dead from 1860 no more broad gauge was laid.
The blight on railway development until 1923 was that there were over 100 different private companies and they all hated each other and would only ever agree to anything if they felt they were getting the better part of any understanding. That attitude did not generally produce good outcomes.
The outstanding example is the Settle - Carlisle railway which should never have been built, was always a financial calamity and was only built because two railway companies could not reach a sensible agreement.
The S&C is now a national treasure but its construction was utter financial folly.
A Victorian HS2?