At the beginning of the eighteenth century the representation of Flintshire was shared by the heads of its leading Tory families, Sir Thomas Hanmer, Sir John Conway and Sir Roger Mostyn, under agreements ratified at county meetings. From 1705 Hanmer took to sitting for English constituencies, leaving Conway and Mostyn to be returned for the county and Flint Boroughs, exchanging seats at agreed intervals. After Conway’s death without a male heir in 1721 Mostyn remained in possession of the county seat till he retired in 1734. A new agreement was then made between the leading Tory families, providing that his son Thomas should stand for the county and Sir John Glynne for the Boroughs; that in the event of a contest they should support one another, sharing expenses; and that if Glynne wished to stand for the county at the next election Mostyn should withdraw.
Number of voters: about 800 in 1702