Updates with latest geopolotical developments, prices

LONDON, July 8 (Reuters) - Benchmark Dutch and British wholesale gas prices rose around 5% on Wednesday morning after U.S. President Donald Trump said the memorandum of understanding to end the conflict with Iran was "over", sparking fears about liquefied natural gas supplies from the region.

The benchmark Dutch front-month contract at the TTF hub TFMBMc1 was up €2.424 at €49.00 per megawatt hour (MWh) or around $16.40 /mmBtu by 1047 GMT, ICE data showed.

The contract touched €49.757, its highest level since June 11.

The British front-month contract NGLNMc1 was up 6 pence at 116.75 pence per therm.

Trump said the interim agreement with Iran was "over" after Tehran carried out new attacks on U.S. bases in the Gulf and tankers in the Strait of Hormuz were also attacked.

A Qatari LNG tanker was at risk of exploding and a Saudi crude tanker was damaged near the Strait on Tuesday, as maritime authorities raised the threat risk for vessels transiting the waterway to severe.

Roughly a fifth of the world's LNG typically passes through the waterway.

"The attacks, including a Qatari LNG carrier, reignited supply risk concerns, prompting a swift risk premium rebuild as shipping traffic through the strait remains well below normal," said analysts at Engie EnergyScan.

The International Energy Agency on Tuesday said if the Strait is not fully reopened before the start of the fourth quarter, global LNG supply could record its first annual decline since 2012.

Average temperatures in north-west Europe are around 4 degrees Celsius above normal and could rise further by the weekend, LSEG data showed.

Gas-for-power demand has risen due to weaker German wind generation, while French nuclear output remains constrained by outages due to high cooling water temperatures, said LSEG gas analyst Dzmitry Dauhalevich.

In the European carbon market, the benchmark contract CFI2Zc1 fell by €1.27 to €78.92 a metric ton.