Argent, a mullet sable, pierced of the field; in dexter chief a crescent gules. Crest: On a wreath of the colours, Upon the battlements of a tower proper, a griffin's head erased gules, charged on the neck with a crescent Or. Motto: Labor omnia vincit. Granted 7 July 1926.
The silver shield with the black five-pointed star was the arms of the Assheton family from the early Middle Ages, and branches of the family used the arms with slight differences or by adding the marks of younger sons. One such mark is the crescent, and it was this particular branch of the family whose arms were assumed by the Town Commissioners in the 1830s. The Borough Council inherited this assumption in 1847 but it was not until 1926 that The College of Arms granted the present arms which denote the borough while retaining the link with the original lords of the manor.
The motto means Persistent Works Triumphs and is a quotation from Virgil's Georgics.