St Mary's Island, River Thames

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St Mary's Island is a tiny island in the River Thames in England. It has a size of about 150 m by 50 m.^{[1] [2]}

The island is on the reach above Caversham Lock on the western outskirts of the town of Reading, Berkshire. It is close in to the northern (Caversham) bank in an area called The Fishery and is unpopulated.^{[citation needed]}