When a one-person plane powered purely by electricity took to the skies above the village of Little Snoring, it was a remarkable achievement in British engineering.
The maiden voyage of the first all-electric light aircraft designed and built entirely in the UK could herald the beginning of a new, homegrown, zero-emissions aerospace manufacturing industry.
But its victory lap didn't last long. The plane was up for just 33 minutes above the airfield in Norfolk, before it came back down for a recharge.
The all-electric microlight aeroplane could last up to 90 minutes on full charge "on paper", according to Guy Gratton, an associate professor of aviation at Cranfield University, who piloted the Sherwood eKub.
The plane was manufactured by The Light Aircraft Company (TLAC), which sells small planes to hobbyists around the world, and built by a British-based consortium led by Gratton.
It is a major achievement in the race to establish emission-free air travel which the Government has backed with its Jet Zero Council. But it is unlikely to be the answer to eliminate the guilt from your overseas holidays any time soon.
Likely to be limited to domestic flights
The size of batteries needed to go a significant distance means the technology is likely to be limited to very short-haul domestic flights, Mr Gratton said.
"Everybody who is knowledgeable is sceptical about what we can deliver," he acknowledged. "They are right to be sceptical. What we've got is slower, lower performing, heavier and less capable than an aeroplane with a conventional engine."
"If you want to hop between Scottish islands, for instance, I think that will happen reasonably quickly, perhaps within 10 years.
"But with the big jets going a long way, I can't see this tech working. They simply need a higher energy density."
Gratton has now taken the Sherwood eKub on five flights around the airfield in Little Snoring, where TLAC, the last light aircraft manufacturer in the UK, is based.
"The first flight I was incredibly nervous despite all the ground tests and prep because there was so much we didn't know," he said. "By now I'm getting a lot more comfortable with it."
The Government set up the Jet Zero Council in 2020 to support the development of low-carbon aviation, and has backed several projects including an aircraft built by Rolls Royce which last year completed its first 15-minute flight from MoD Boscombe Down.
Biofuels the answer to long-haul flights
The electric Sherwood eKub, which was also backed by the Government, joins other pure electric planes, including the Slovenian two-seater Pipistrel Velis Electro, which recently became the first to be certified by the EU's Aviation Safety Agency.
Others are working on hydrogen or hybrid models, which could use more traditional fuels as a backup for battery power.
American Airlines and Virgin Atlantic are among several airlines to be working on deals to run zero emission electric vertical takeoff and landing aircraft, which they say can replace traditional helicopters.
But Gratton said "Jet Zero" technology was unlikely to be ready in time to meet the Government's climate targets to be carbon neutral by 2050.
"I think with longer haul, the answer will be biofuels in the short or medium term. I'm not sure any of us know what the longer term looks like."
Paul Hendry-Smith, the managing director of TLAC, says the use for the electric plane was likely to be niche.
"For the hobbyist, the leisure aviator, there is undoubtedly a market for it," he said. "But I'm certainly not basing my entire company's future business on the project."