LONDON, May 6 (Reuters) - Dutch and British wholesale gas prices were down on Wednesday morning after U.S. President Trump indicated a possible deal to end the war with Iran.

The benchmark Dutch front-month contract at the TTF hub TFMBMc1 was down 1.50 euro at 45.42 euros per megawatt hour (MWh), or around $15.63/mmBtu, as of 0804 GMT, ICE data showed.

The British front-month contract NGLNMc1 was down 4.02 pence at 111.00 pence per therm.

U.S. President Donald Trump said on Tuesday he would briefly pause an operation to help escort ships through the Strait of Hormuz, citing "great progress" toward a comprehensive agreement with Iran.

"We have mutually agreed that, while the blockade will remain in full force and effect, Project Freedom ... will be paused for a short period of time to see whether or not the Agreement can be finalized and signed," Trump wrote on social media.

The bullish momentum is weakening, but only very slightly, with TTF month-ahead prices remaining above their 20-day average, analysts at Engie's EnergyScan said in a morning note.

"More will be needed -and in particular a peace agreement-for the market to adopt a truly bearish momentum," they added.

LSEG analyst Saku Jussila said that Trump’s full turn on the so-called Project Freedom should lead to "sideways-bearish trading" on Wednesday, adding that "the bullish short-term fundamentals should restrict any major downside."

Temperatures forecast across north-west Europe were adjusted lower from May 10. Residential demand for heating is expected to be 33 gigawatt hours per day higher on the day ahead at 1,288 GWh/d.

Gas demand for power generation is expected to rise 114 GWh/d on the day ahead to 2,556 GWh/d as wind power output is falling again on Thursday.

In the European carbon market, the benchmark contract CFI2Zc1 was up 0.25 euro at 75.96 euros a metric ton.