Britain's gas storage levels are worryingly low, with less than a week's worth of gas in storage after a cold snap, energy company Centrica said on Friday while the government said there was no need for concern.

Britain has enough gas, the network operator has said after warnings that stores are at “concerningly low” levels. National Gas said on Friday that supplies remain “healthy” and that Britain is “well-placed” to respond to demands this winter.

Plunging temperatures and high demand for gas-fired power are the main factors behind the low levels - with the operator of the country's largest gas storage site warning there is less than a week of demand available.

As of Thursday, stocks at UK gas storage sites were 26 per cent lower than they were at the same time last year, leaving them about half full, according to a statement on Friday from Centrica. The cold conditions in the UK,

Centrica Plc says that the UK’s gas reserves are at “concerningly low” levels as freezing temperatures grip the country, boosting demand for heating.

Centrica said the UK “has less than a week of gas demand in store” and that Britain’s storage sites are 26 per cent lower than they were at the same time last year, leaving them around half full. Gas supplies have come under strain after a cold snap across the UK and the end of Russian gas pipeline supplies through Ukraine at the end of last month.

Britain's biggest gas supplier said Friday UK storage levels are "concerningly low" owing to high demand caused by freezing weather and after Ukraine ended Russian gas transit to Europe.