Wales
Denny Island (Welsh: Ynys Denny; grid reference ST459810) is a small uninhabited rocky island of 0.24 hectares (0.6 acres), with scrub vegetation, in the Severn Estuary. Its rocky southern foreshore marks the boundary between England and Wales.
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Part of the Wales islands map.
Welsh: Ynys Denny
Last reviewed: 2026-08-13.