UK GAS-Prices edge lower on oversupplied system

LONDON, May 29 (Reuters) - British wholesale gas prices edged lower on Wednesday morning due to an oversupplied system and lower demand.

* Day-day gas price was down 0.35 pence at 29.90 p/therm at 0933 GMT.

* Gas for immediate delivery inched down by 0.35 pence to 30.00 p/therm.

* "Demand isn't really there with warmer weather the rest of this week and wind (output) is going up," a gas trader said.

* The gas system was around 7 million cubic meters (mcm) oversupplied, with demand forecast at nearly 203 mcm and supply at 210 mcm/day, National Grid data shows.

* Temperatures on Thursday have been revised to be 4.1 degrees Celsius higher than previously, Refintiv Eikon data shows.

* However, the average forecast across the next 15 days is 0.3C lower than before.

* Local distribution zone consumption is 9 mcm lower than the previous day.

* Wind generation is forecast to increase to 7.4 gigawatts (GW) on Thursday from 6.4 GW on Wednesday, Elexon data shows, which will potentially reduce gas demand from power plants.

* On the supply side, flows from Norway via the Langeled pipeline are expected to be 5 mcm lower than on Tuesday.

* There are a number of outages at Norwegian gas fields restricting flows now and throughout June.

* From Monday, there is also maintenance at UK gas field Cygnus.

* Liquefied natural gas send-out in Britain was forecast to drop by around 9 mcm to 56 mcm on Wednesday, but on the continent LNG send-out has increased.

* The June contract was up 0.12 pence at 30.50 pence/therm.

* Day-ahead gas price at the Dutch TTF hub inched down by 0.15 euro to 12.35 euros per megawatt hour (MWh).

* The fall is ahead of a holiday in many European countries on Thursday and warmer weather, another trader said.

* Benchmark Dec-19 EU carbon contract was 0.32 euro higher at 25.80 euros a tonne. (Reporting by Ekaterina Kravtsova; editing by Nina Chestney)