UK GAS-Prompt prices dip as temperatures set to rise

LONDON, April 27 (Reuters) - British prompt gas prices fell on Thursday morning on continued strong withdrawals from Rough storage and predictions of falling demand as temperatures rise next week.

* British within-day contract down by 0.25 pence to 41.90 p/therm at 0815 GMT.

* Day-ahead gas price down 0.2 pence at 41.05 p/therm.

* Spot and prompt contracts fell on milder weather forecasts and continued withdrawals from Rough storage. The facility will not replenish its reserves this summer because of a lengthy shutdown - a bearish signal for the UK gas market.

* The system was undersupplied by about 15.7 million cubic metres (mcm), with flows forecast at 272.6 mcm/day and demand at 288.3 mcm, National Grid (LSE: NG.L - news) data shows.

* Flows through the Langeled pipeline from Norway are at 49 mcm, down from 55 mcm on Wednesday.

* The May gas price was up 0.35 pence at 39.95 p/therm.

* Day-ahead gas at the Dutch TTF hub rose by 0.20 euros to 16.60 euros/MWh.

* The benchmark Dec (Shanghai: 600875.SS - news) -17 EU carbon contract gained 0.02 euros to 4.63 euros a tonne.

* Thomson Reuters (Dusseldorf: TOC.DU - news) analyst view: http://emea1.apps.cp.extranet.thomsonreuters.biz/cms/?pageid=united-kingdom-gas (Reporting by Oleg Vukmanovic; Editing by David Goodman)