UK GAS-Prices edge up on cooler temperature forecasts

LONDON, May 28 (Reuters) - British wholesale gas prices edged up on Tuesday morning, in quiet trade after a UK holiday, as weather forecasts showed a return to seasonal temperatures next week.

* Within-day gas price was up 0.50 pence at 29.85 p/therm at 0800 GMT.

* The June contract inched up by 0.05 pence to 30.25 p/therm.

* Cooler temperatures are now forecast for next week compared to expectations on Friday, a trader said.

* Refinitiv Eikon data shows the average daily temperature forecast across the next 15 days is 0.4 degree Celsius lower than previously forecast.

* The average daily temperatures forecast for Tuesday has been lowered by 2.7 degrees Celsius to 11.5 degrees.

* Another trader added that as Monday was a holiday in Britain, trade is quite slow and prices could shift direction later in the day.

* On the supply side, send-out from British terminals has dipped slightly to 60 million cubic metres (mcm) per day compared to 66 mcm the previous day.

* Storage injections are nominated at 18 mcm/day.

* However, gas flows via the Langeled pipeline from Norway rose by 27 million cubic metres (mcm) to 40 mcm after a significant reduction on Friday.

* "These flows were most likely offline due to commercial reasons," Refinitiv Eikon gas analysts said in a note.

* The system is largely balanced with demand forecast at 226.7 million cubic metres (mcm) and supply at 225.7 mcm a day, National Grid data shows.

* Peak wind generation is forecast at around 3.2 gigawatts (GW) on Tuesday out of a total metered capacity of around 12 GW but that is expected to rise to 6.3 GW on Wednesday, Elexon data shows.

* Day-ahead gas price at the Dutch TTF hub inched up by 0.02 euro to 12.32 euros per megawatt hour

* Benchmark Dec-19 EU carbon contract fell by 0.26 euro to 25.33 euros a tonne. (Reporting by Sabina Zawadzki; editing by Nina Chestney)