UK GAS-Prices fall on supply surplus from higher flows from Norway

Sept 12 (Reuters) - British wholesale gas prices fell on Wednesday as flows through Norway's largest pipeline Langeled rose, creating a supply surplus.

* Day-ahead gas fell by 2.65 pence to 73.00 pence per therm by 0837 GMT

* Within-day gas price down 3.70 pence at 72.30 pence per therm

* A rise in flows through Norway's Langeled pipeline created a long system and caused prices to decline amid the gas oversupply, said a British gas trader

* The market is oversupplied, with demand forecast at 176.9 million cubic metres (mcm) and flows at 183.4 mcm/day, National Grid data shows

* Gas supply from Norway to Britain rose to 71 mcm per day from 45 mcm the previous day as flows through the Langeled pipeline rose significantly

* Gas prices rose despite temperatures on Wednesday falling short of forecasts for warmer weather.

* Average daily temperatures in Britain are seen around 14.2 degrees Celsius on Wednesday and are forecast to fall to 12.7 C the next day, lower than previous estimates, Thomson Reuters (Dusseldorf: TOC.DU - news) Eikon data shows

* October contract down 2.00 pence at 72.90 p/therm

* In the Dutch gas market, the day-ahead price at the TTF hub was down 0.80 euro at 27.90 euros per megawatt hour

* The benchmark Dec (Shanghai: 600875.SS - news) -18 EU carbon contract fell by 0.50 euro to 23.68 euros a tonne (Reporting by Lefteris Karagiannopoulos in Oslo; editing by Alexander Smith)