HMS Erin's Isle was a United Kingdom passenger paddle steamer built by A&J Inglis for the Belfast and County Down Railway (B&CDR).

At the end of the 1911 summer season the railway planned to sell PS Slieve Bearnagh, which dated from 1894,[6] and replace her with a new, larger and more modern ship.

On 6 February 1919 she sailed from Sheerness on the Isle of Sheppey and anchored for the night in the North Edinburgh Channel off the Thames Estuary,[5] not far from the Nore sandbank.

[5] About five minutes later a drifting mine struck the forward part of her starboard side beneath the seamen's quarters, blowing her practically in two.

In August 2004 the Port of London Authority was advised that the MoD had not designated wreck as a protected place under the Act, but could decide to do so in future.