[4] In February 1702, Meredyth was appointed Colonel of the 37th Regiment of Foot in the expansion of the Army prior to the War of the Spanish Succession.
[5] Now in command of a Brigade, he participated in the campaigns of 1705 and 1706, including the Moselle expedition and the forcing of the French lines at Eliksem and Neer-Hespen.
He lost his seat at the 1710 British general election and was dismissed from all his positions in December 1710 for his opposition to the Tory Harley Ministry.
[8] When the Tories fell in 1714, Meredyth was reinstated and appointed Governor of Londonderry, member of the Irish Privy Council and Colonel of the 20th Regiment of Foot.
He also made provision in his will, for two illegitimate daughters living in Hertfordshire and a son at school in Lisburn, country Antrim.