River Thames shipping coming in and out of London, in 1732 it received the world's first lightship. This became a major landmark, and was used as an assembly point for shipping. Today it is marked by Sea Reach No. 1 Buoy. The River Thames contains over 80 islands ranging from the large estuarial marshlands of the Isle of Sheppey and Canvey Island to small tree-covered islets like Rose Isle in Oxfordshire and Headpile Eyot in Berkshire. They are found all the way from the Isle of Sheppey in Kent to Fiddler's Island in Oxfordshire. Some of the largest inland islands, for example
Estuary English various rates "socially" into middle-class speech and "geographically" into other accents of southeastern England. The scholar Alan Cruttenden uses the term London Regional General British in preference to the popular term 'Estuary English'. The names listed above may be abbreviated: Some authors use different names for EE closer to Cockney (Popular London) and EE closer to Received Pronunciation (London Regional Standard or South-Eastern Regional Standard). Note that some other authors use the name Popular London to refer to Cockney itself. The boundary between Estuary English and Cockney is far from clearcut. Several writers have argued that Estuary English is not