Career
Tyrrell was appointed ensign in a regiment of foot on 6 February 1694 and served under King William III in the Netherlands. He distinguished himself in the wars of Queen Anne and was promoted to the colonelcy of a newly raised regiment of foot in April 1709. At the peace of Utrecht his regiment was disbanded, and in 1715 he raised a regiment of dragoons for the service of King George I, which was disbanded in November 1718.
On 7 November 1722 the King gave him the colonelcy of the 17th Regiment of Foot.
Tyrrell was promoted to the rank of brigadier-general in 1727, to that of major-general in 1735, and lieutenant-general in 1739. In 1722 he was returned to Parliament for Boroughbridge, one of the Duke of Newcastle"s pocket boroughs, sitting until his death.
He also served as Governor of Pendennis Castle, of Gravesend and Tilbury and of Berwick-upon-Tweed.
