Day-ahead price up on strong oil, within-day falls

• The British gas system was slightly undersupplied, with demand forecast.
• Gas prices rose on colder weather and stronger oil prices after a weekend attack at a Saudi Aramco facility.
• Gas price in Britain reached very high levels last week and traded lower on Monday.

LONDON: British day-ahead prompt gas prices rose on colder weather and stronger oil prices after a weekend attack at a Saudi Aramco facility, while within-day traded lower on Monday.

* Within-day gas down 1.75 pence at 31.00 p/therm by 0902 GMT

* Day-ahead gas up 1.25 pence to 31.25 pence/therm

* Within-day gas price in Britain reached very high levels last week and traded lower on Monday.

* The day-ahead price, however, followed oil with temperatures are expected to fall in Britain on Tuesday, traders added.

* Oil prices surged on Monday, with Brent crude posting its biggest intra-day percentage gain since the Gulf War in 1991, after an attack on Saudi Arabian oil facilities on Saturday shut more than 5% of global supply.

* Average daily temperatures are forecast at 14.7 degrees Celsius for Monday and are expected to fall to 12.6C the next day, Refinitiv Eikon data showed.

* The British gas system was slightly undersupplied, with demand forecast at 169.4 million cubic metres (mcm) and supply at 167.6 mcm/day, National Grid data showed.

* Norwegian gas flows to Britain are at low levels, flat at 22 mcm/day. Gas flows via the largest pipeline between the two countries, Langeled, remain halted due to maintenance. Flows via Vesterled were also low at 5 mcm/day.

* Wind power generation is expected to reach 4.6 gigawatts (GW) on Monday out of 12.1 GW capacity, according to Elexon data. It is forecast at 4.4 GW on Tuesday.

* The October gas contract fell by 0.08 pence to 38.70 pence per therm.

* Day-ahead gas at the Dutch TTF hub rose by 0.73 euro to 11.30 euros per megawatt hour (MWh)

* The Dutch month-ahead gas contract, a benchmark for LNG prices as well as European gas, was up by 0.35 euro at 14.75 euros/MWh.

* The benchmark Dec-19 EU carbon contract rose by 0.20 euros to 26.58 euros a tonne