John Charles Bigham, 1st Viscount Mersey, was a British jurist and politician. After early success as a lawyer and a less successful spell as a politician, he was appointed a judge and worked in commercial law.

Liverpool Exchange was a borough constituency within the city of Liverpool in England, centred on Liverpool Exchange railway station. It returned one Member of Parliament (MP) to the House of Commons of the Parliament of the United Kingdom, elected by the first past the post system.