Flat Holm, Cardiff, off Lavernock Point, Vale of Glamorgan at Southernmost settlement – Rhoose, Vale of Glamorgan at Westernmost point – Grassholm, Pembrokeshire at Westernmost settlement – Treginnis, Pembrokeshire at Easternmost point – Lady Park Wood, near Monmouth, Monmouthshire at Easternmost settlement – Chepstow, Monmouthshire at Welsh mainland Northernmost point – Point of Ayr, Flintshire at Northernmost settlement – Talacre, Flintshire at Southernmost point – Breaksea Point, Vale of Glamorgan at Southernmost settlement – Rhoose, Vale of Glamorgan at Westernmost point – Pen Dal-aderyn, Pembrokeshire at Westernmost settlement – Treginnis, Pembrokeshire at Easternmost point – Lady Park Wood, near Monmouth, Monmouthshire at Easternmost settlement – Chepstow, Monmouthshire at British Overseas Territories and Crown dependencies Northernmost – Point of Ayre, Isle of Man at Southernmost – South Pole, British Antarctic Territory at – disputed Southernmost – Thule Island, South Sandwich Islands at – if not including Antarctica Westernmost – Oeno Island, Pitcairn Islands at Easternmost – Diego Garcia, British Indian Ocean Territory at – disputed Easternmost - Ayios Nikolaos Station, Dhekelia Cantonment in Cyprus at - if not including BIOT See also Centre points of the United Kingdom Geography of the United Kingdom List of mountains and hills of the United Kingdom Extreme points of the British Isles Extreme points of Ireland Extreme points of the European Union Extreme points of Europe Extreme points of Eurasia Extreme points of Africa-Eurasia Extreme points of Earth References United Kingdom Extreme points