ZeroAvia is making significant strides towards scaling and commercializing its retrofit product offerings, with plans for inaugural A to B flights and the launch of ZA600 and ZA2000 powerplants in 2026 and 2028 respectively. The company's UK facility at Cotswold Airport is at the forefront of disruptive propulsion technology, particularly focusing on hydrogen elements in their developments. Flight testing work, currently centered around the Dornier 228 aircraft running on gaseous hydrogen, has seen successful tests in altitude and duration, marking progress in this innovative technology. ZeroAvia's approach includes a 'stepping stone' strategy, starting with community segment technology like the single-engine Cessna Caravan before moving towards larger commercial aircraft like the Dash 8. The company's ongoing work at Kemble and Sandwich facilities indicates the rapid progress being made towards achieving supplemental type certification for larger aircraft by the end of the decade.