TA postcode area
These cover western Somerset ( including Taunton , Bridgwater , Burnham-on-Sea , Chard , Crewkerne , Dulverton , Highbridge , Hinton St George , Ilminster , Langport , Martock , Merriott , Minehead , Montacute , Somerton , South Petherton , Stoke-sub-Hamdon , Watchet and Wellington ) , plus very small parts of Dorset and Devon . 
<triplet> Dorset <subj> Somerset <obj> shares border with