In the
1886 general election, Williamson was elected to the
House of Commons as
Member of Parliament (MP) for
Lancaster, and held his seat at the
1892 election. Williamson was a strong supporter of Prime Minister
William Ewart Gladstone, the Liberal Party leader, and Gladstone likewise held Williamson in high regard for his business instincts. Williamson was a supporter of Gladstone's
Government of Ireland Bill 1893, and gave generously to Irish causes. Gladstone planned to recommend Williamson for a
peerage but resigned in 1894, without any outgoing honours. The next year, though, Williamson was elevated to the peerage as
Baron Ashton, of Ashton in the County Palatine of Lancaster, during the
Prime Minister's Resignation Honours of
Lord Rosebery. He was also
Deputy Lieutenant of Lancashire and was elected as president of the
Lancashire County Cricket Club in 1927. In later years, he became a virtual social recluse, although still running his business interests. He divided his time between Ashton Park and Ryelands House, his other home in Lancaster. Ryelands became packed with stacks of newspapers and magazines that reportedly reached the ceiling. When in London, he refused to stay at his townhouse, Alford House, instead staying at a hotel. He would not go to social events or pay social calls, and refused to see anyone who had not made an appointment to see him. He even refused to meet a journalist from South America who had travelled to interview him but had mistakenly not arranged the appointment in advance. ==Marriage and issue==