* Within-day gas was down 0.85 pence at 47.90 pence per therm at 0857 GMT.

* Day-ahead gas fell 0.80 pence at 47.75 p/therm.

* Wholesale prices were down on Monday due to mild weather and strong LNG supplies that will arrive in Britain this week, a British gas trader said.

* "Weather turned extremely bearish, with very high temperatures, so it is mainly the demand drop driving gas prices down," he said, adding the gas network was only "slightly short" on Monday morning so extra LNG cargoes would remove the deficit.

* Norwegian gas supplies, which increased from Friday, also assisted the price move, said a second trader.

* Average daily temperatures in Britain are expected to be 4.4 degrees Celsius on Monday and are forecast to rise to 5.6 C on Tuesday.

* Britain received one LNG tanker on Monday and expects six more in the next five days.

* Norwegian gas flows to Britain rose to 110 mcm/day from 98 mcm/day on Friday.

* Prices fell despite the system being undersupplied. Demand in Britain was forecast at 327.7 million cubic metres (mcm) per day and flows at 319.1 mcm/day, National Grid data showed.

* Peak wind power generation is forecast at 5.1 gigawatts (GW) on Monday and will rise to almost 9.3 GW on Tuesday, National Grid data shows.

* The March contract fell 1.45 pence to 47.25 p/therm.

* The benchmark Dec-19 EU carbon contract fell by 0.39 euro to 21.99 euros per tonne.