In England he was commissioned a Captain in Princess Anne of Denmark's Regiment of Foot in 1685 and in 1686 was given command of the 4th Troop of Horse Grenadier Guards.

He joined the Irish Army under the command of Richard Talbot, Earl of Tyrconnell, which had remained loyal to James and was undergoing a major expansion.

[2] Luttrell was a friend and supporter of Sarsfield, and backed his policy of continued resistance following the Jacobite defeat at the Battle of the Boyne in 1690.

During the Siege of Limerick, he was found to be in correspondence with the besiegers, and scarcely escaped hanging, bringing his regiment of horse over to the Williamite side after the surrender of the city.

As a reward, he received the forfeited estates of his elder brother, Simon Luttrell, including Luttrellstown, and was made a major general in the Dutch army.

[4] According to the reports circulated at the time, it was a blacksmith of his own name, residing in Bridge-street, Dublin, who did so, in the hope of succeeding to his estates; believing that the Colonel was not married to the mother of his children.

[6][7] An attempt was made too to kill his grandson Henry Luttrell, 2nd Earl of Carhampton,[8] also heavily despised with many enemies, and who sold Luttrellstown Castle, which the family had owned for almost 600 years, in 1800.