June 30 (Reuters) - British wholesale gas prices fell on Friday due to increased Norwegian flows that caused the system to be oversupplied.
* Day-ahead gas price fell by 1.25 pence to 35.50 pence/therm at 0824 GMT.
* Gas for weekend delivery was 1.15 pence lower at 35.15 p/therm.
* Friday's gas imports to Britain from Norway jumped to 66 million cubic metres (mcm) from 48 mcm on Thursday, an increase led by doubled flows from the Langeled pipeline at 38 mcm.
* Norwegian flows to Britain via the Entry SEGAL pipeline system remained low at 12 mcm from 14 mcm the previous day, as an ongoing outage at Norway's Gjoea field has reduced flows.
* The ongoing outage that causes the reduced Entry SEGAL flows, could last up to two weeks, Norwegian gas system operator Gassco said, revising its previous estimate of 8 to 10 days.
* Britain's gas market was oversupplied, with forecast daily demand at 179.2 mcm/day and supplies at 188.5 mcm/day, National Grid data showed.
* Average temperatures on Friday could reach 22 degrees Celsius in southern Britain and are forecast to mostly maintain their levels over the weekend, UK Met Office data showed.
* July gas contract was down by 0.75 pence to 35.60 p/therm.
* Day-ahead gas at the Dutch TTF hub fell by 0.08 euros at 14.90 euros/MWh.
* Benchmark Dec-17 EU carbon contract rose by 0.01 euros to 5.08 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 Lefteris Karagiannopoulos in Oslo)