Drilling has commenced, using rig Marriott 50, at the Horse Hill-1 well in PEDL 137, on the northern side of the UK’s Weald basin in West Sussex. Planned depth is 8,680 ft; primary targets include the Jurassic Portland and Corallian sandstones. The Great Oolite limestone is a secondary target. After penetrating Jurassic intervals, the well will be drilled to total depth to test for Triassic-aged formations for natural gas. Horse Hill‑1 is operated by special-purpose company Horse Hill Developments (65%), along with partner Magellan Oil (35%).