He was created a Baronet (of Moore Lodge, Ballymoney, County Antrim, Northern Ireland) in 1932.

[1] Sir William went on to become a Deputy Lieutenant for County Antrim and a Justice of the Peace.

[1] In 1903, Sir William was one of the first landowners of Ireland to sell off their estates under the land acts.

This house was once owned by the son of Nicholas Grimshaw (1747–1805), Ireland's first cotton pioneer.

He was a passionate Orangeman: his vehemence in defending Ulster's right to oppose Irish Home Rule is said to have alarmed even those who shared his views.

Speaking in England on 10 March 1913 Moore made his feelings clear on the possibility of Irish Home Rule: "I have no doubt, if Home Rule is carried, its baptism in Ireland will be a baptism in blood.