Essex
One of the home counties , it borders Suffolk and Cambridgeshire to the north , Hertfordshire to the west , Kent across the estuary of the River Thames to the south and London to the southwest . 
<triplet> Suffolk <subj> Cambridgeshire <obj> shares border with <triplet> Cambridgeshire <subj> Suffolk <obj> shares border with <subj> Hertfordshire <obj> shares border with <triplet> Hertfordshire <subj> Cambridgeshire <obj> shares border with <triplet> River Thames <subj> Kent <obj> located in the administrative territorial entity