UK GAS-Day-ahead price up on reduced supply, higher exports

* UK gas system undersupplied by nearly 13 mcm

* UKCS production down, less LNG supply and higher exports

May 11 (Reuters) - British day-ahead natural gas prices rose on Monday morning due to lower domestic production and liquefied natural gas (LNG) supply, as well as higher exports to continental Europe.

Prices for delivery on Tuesday were up 0.90 pence or 2.05 percent at 44.80 pence per therm at 0848 GMT from the previous settlement.

"A short system has boosted the day-ahead price - there is less LNG supply than of late, UKCS (UK Continental Shelf) production is down and exports are up," a UK gas trader said.

National Grid (LSE: NG.L - news) data showed the British gas system was undersupplied by 12.7 million cubic metres on Monday, as demand was forecast to be 181.5 mcm and supply at 168.8 mcm/day.

UKCS production was lower, with reduced flows into the St Fergus terminal. Exports to continental Europe have also risen due to lower gas consumption by utilities in Britain and the tightening of the ZEE-NBP (Shanghai: 601018.SS - news) (Belgium-UK) spread.

Meanwhile, Norwegian gas flows to Britain have risen by 22 mcm per day on Monday compared with Friday when they were disrupted due to a series of outages, analysts at Thomson Reuters Point Carbon said.

Gas for immediate delivery was down 1.65 pence or 3.53 percent at 45.10 pence per therm due to lower consumption because of higher-than-average temperatures in Britain on Monday.

In the Netherlands, TTF hub prices were higher. The day-ahead price was up 0.20 euros at 20.53 euros per megawatt hour.

Consumption is forecast to rise later this week which could increase withdrawals from storage on Monday and Tuesday, analysts said.

In the European Union's carbon market, benchmark prices ticked down 0.01 euro cent to 7.56 euros per tonne. (Reporting by Nina Chestney; editing by Susan Thomas)