sentences:  The units were located at Portland (EGDP) and Lee-on-Solent (EGHF) on the south coast of England, at Stornoway (EGPO) in the Outer Hebrides, and at Sumburgh (EGPB) in the Shetland Isles.Northern North Sea services operated from Aberdeen (EGPD), Scatsta (EGPM) and Stavanger (ENZV).Southern North Sea services operate from Norwich (EGSH), Humberside (EGNJ) and Den Helder (EHKD) with its support organisation based at Redhill (EGKR).