Eyre married into one of the wealthiest and politically most prominent of north Wiltshire families, and in 1581 inherited his father’s considerable estates, which numbered more than a dozen manors, including the family’s principal estate at Great Chalfield.
In about 1598 Eyre was listed as one of the six most important gentlemen of Wiltshire.
Eyre was elected in 1604 for Heytesbury, a borough controlled by the Thynnes; but he left no trace upon the records of the first Jacobean Parliament.
