What the original notice required
Hong Kong's government announced on June 28, 2021 that passenger flights from the United Kingdom would be prohibited from landing from midnight on July 1, Hong Kong time. The notice invoked its place-specific flight-suspension mechanism and reclassified the UK under the COVID-19 arrival rules then in force.
The policy was tied to the public-health framework of that period. It was a restriction on passenger arrivals under specified conditions, not a statement that the UK and Hong Kong would permanently lose all air links.
Source [1]What a traveler needs to check now
An old government notice can establish why a flight was affected in 2021, but it cannot establish today's boarding, transit or entry requirements. Those should be checked with the destination government and airline for the actual itinerary and travel date.
Flight status, airport restrictions and permission to enter a country are separate questions. A flight can be scheduled while an individual traveler still lacks the documents required to board or enter. NewsCubby's flight tools and the linked checklist help organize status checks, while official destination guidance remains the source for entry rules.
Source [1]