How vulnerable is UK energy system as tensions rise between Russia and Ukraine?

Fears grow that the Kremlin may restrict gas exports to Europe in the face of potential sanctions

The deepening tensions between Russia, the world's biggest gas producer, and Ukraine have reignited fears that the Kremlin may weaponise its gas reserves by restricting exports to Europe in the face of potential sanctions.

Russia is western Europe's largest single supplier of gas, a commodity that is in tight supply globally and has reached record market price highs in recent weeks, threatening to tip the UK into a national energy crisis.