Sunday Times revealed the latest news:

the British Royal Air Force (RAF) have confirmed that they are assessing the possibility of flying battery-powered aircraft, based on the tests performed on Pipistrel’s electric planes.

Pipistrel’s Velis Electro has been first tested by a smaller team from the British Air and Space Warfare Centre (AWSC) already in June at the Damyns Hall airfield near Essex, and they are planning more flights in the coming months.

The RAF are working towards environmentally friendly alternatives to the present aviation technologies. The reason may be that the UK’s defense forces produce as much as 50 per cent of all UK government’s CO2 emissions. Since aviation together produces about a billion tonnes of CO2 per year, the British military wants to make an integral contribution to the UK government’s ambitious plans to tackle climate changes.

Velis Electro is also already flown by Danish air forces:
RAF will use Pipistrel Velis Electro, the only electric plane with full type-certification, for pilot training. It is quieter, cheaper to operate and needs less maintenance than its petrol-powered counterpart, because it has less moving parts. Combat planes will remain jet-powered, because they are much faster this way.