UK GAS-Day-ahead price down on rising temperatures

LONDON, May 25 (Reuters) - British gas for day-ahead delivery was lower on Thursday morning as rising temperatures into the weekend reduced demand. * Day-ahead gas price down 0.65 pence at 36.35 pence per therm at 0837 GMT. * Traders said the day-ahead price has fallen because warmer weather is reducing demand. * Temperatures in southern England are expected to reach 26 degrees Celsius on Friday and Saturday (Shenzhen: 002291.SZ - news) , falling to around 20 degrees C by Monday, Met Office data shows. * Within-day contract up 0.30 pence at 37.20 pence per therm at 0828 GMT. * The gas system is undersupplied by around 8 million cubic metres (mcm), with demand forecast at 187 mcm and flows at 179 mcm/day, National Grid (LSE: NG.L - news) data shows. * Imports through the Langeled pipeline are quite low at 17 mcm and exports through the InterconnectorUK are at 18 mcm. * June gas contract was 0.22 pence higher at 36.18 p/therm. * Day-ahead gas price at the Dutch TTF hub was 0.05 euro higher at 15.25 euros per megawatt hour. * Benchmark Dec-17 EU carbon contract was up 0.05 euro at 4.96 euros per tonne. * Thomson Reuters (Dusseldorf: TOC.DU - news) analyst view: http://emea1.apps.cp.extranet.thomsonreuters.biz/cms/?pageid=united-kingdom-gas (Reporting by Nina Chestney)