Mullion is a civil parish and village on the Lizard Peninsula in south Cornwall, England, United Kingdom. The nearest town is Helston approximately 5 miles to the north. Mullion civil parish encompasses the church town and four smaller settlements: Mullion Cove and Predannack to the southwest; Trewoon and Meaver to the east. Mullion is bordereā¦Mullion is a civil parish and village on the Lizard Peninsula in south Cornwall, England, United Kingdom. The nearest town is Helston approximately 5 miles to the north. Mullion civil parish encompasses the church town and four smaller settlements: Mullion Cove and Predannack to the southwest; Trewoon and Meaver to the east. Mullion is bordered by the parishes of Gunwalloe and Cury to the north, Grade-Ruan to the east, Landewednack to the south, and by Mount's Bay to the west. The parish also includes Mullion Island, a uninhabited island approximately half a mile offshore from Mullion Cove. The island is home to large colonies of seabirds and is owned by the National Trust.