STOCK WATCH

■ SHARES in minnow Igas Energy rocketed yesterday after the company announced a tie-up with Scottish energy firm SSE.

Igas said that under the deal it will work with SSE to develop a geothermal heating network in Stoke-onTrent over the next 12 months.

Geothermal energy is when heat from the Earth’s crust is used to power electricity generators, usually by pumping hot water and steam out of the ground, which is then used to drive turbines.

Igas shares surged 51.6pc, or 9.8p, to 28.8p on the back of the news.