ICSPACE25 was launched from Felixstowe on 30 April 2021 by Steve Randall(Many Thanks). It was a twin balloon launch, both prestretched to 0.16 cubic meters over the course of 28 hours at ~0.6 psi. It floated at 10.8 km altitude, lower than expected.
It uses the same tracker design as icspace22 and 23.
Sadly, it failed to reappear the following morning, and we are investigating why it failed overnight.