@Avtur
There are some snippets about certification on Google.
e.g.
HAV Delays Hybrid Airship Flight; Selex To Study Sensors | Defense News: Aviation International News
HAV is planning a 200-hour flight-test program leading to certification of the Airlander 10 under UK CAA Section B regulations, and/or EASA regulations still under development. HAV has only 40 employees, but holds 21 patents for what it describes as a "disruptive technology."
Hybrid Air Vehicles - Airlander receives environmentally friendly transport funding
HAV received the funding through the EU’s Smart, Green and Integrated Transport Societal Challenge that aims to bolster European transport, specifically that which is resource-efficient, climate friendly and safe, the company says.
The funding will facilitate the development of a regulatory framework for EASA certification of hybrid airships so that it will be certified to a civil standard and away from the military specification that it was built to.
......
It is now working to take it towards a first UK flight, while developing it to both a military and civil specification for different requirements, hence the work to take it to an EASA-certifiable standard.