From Aunty Beeb:
"[Q] Will we have to keep wearing masks or face coverings?
[A]] Once more people have had a vaccine and more is known about how they affect the transmission of Covid, other measures to limit its spread can be reviewed, the government says.
This will include the wearing of face masks or coverings.
They might still be needed in some circumstances and particularly during winter, however.
Health Secretary Matt Hancock has said he hopes they would become the norm on public transport as a matter of "personal responsibility". "
https://www.bbc.co.uk/news/health-51205344
So it seems that we might need to get used to the idea that we'll have to wear masks on buses, trains and planes indefinitely, as well as elsewhere (perhaps such as in shops) during the winter months in years to come.
I've seen similar views from scientists expressed elsewhere. (i.e. wearing masks when going shopping, etc will simply become the norm in future).