OS 1:50 000: Landranger 181 Minehead (Powerline & Obstruction Overprint)…. 07/22/2026 ORDNANCE SURVEY 1:50 000: OS LANDRANGER MAP 181 MINEHEAD & BRENDON HILLS: DULVERTON & TIVERTON.POWERLINE AND OBSTRUCTION OVERPRINT.EDITION D1 REVISED 2009.