The UK is attending the assembly with the aim of reaching agreements which help secure the sustainability and resilience of global aviation.
During Trevelyan’s opening statement, ICAO – the United Nations’ body in charge of ensuring aviation is "safe, secure and environmentally friendly" – will be urged to adopt a long-term goal to clean up the sector and reduce its emissions in line with the Paris Agreement.
She will also highlight the need for countries around the world to "learn lessons" from the international response to the Covid-19 pandemic and to ensure the global aviation sector is better prepared for future threats, such as public health crises.