I was told this during covid . My partner had come with me and our 1 year old son to the UK around a month before the covid lock down.
Her VIsa for UK was 6 months , after 9 we were told she didn't have to go back to her country of origin/nationality (Thailand) as the UK home office understood no flights to there BUT she could go to another country ◇(France for example ) but had to leave the UK. Your visa is up leave, where you go is upto you basically. As it stands if your flight is cancelled etc you will overstay with fine . Pop to Viertnam or somewhere else for a bit ? Having travel insurance may help....
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