I was in Birmingham a couple of weeks ago and you could leave New Street Station by the main entrance onto Smallbrook Queensway but you couldn't enter the station there. Someone guards the entrance and tells people they must use the walkway to Stephenson Street.
However, at Stephenson Street you can both enter and leave even though it's more of a confined space. To enter, you must use the doors at the Navigation Street end and then double back along the narrow concourse.
It's another station where you need to be aware of the procedure if you're a bit pushed for time, especially if you arrive by taxi.
And of the three sets of doors into the station from Stephenson Street, they make you walk all the way round to the very last set of doors, right on the corner of Navigation Street, before you can enter.
Or at least they were yesterday when I went past there.
Perhaps it will be different today though, as the configuration of entrances and exits seems to vary with the availability of staff, rather than whether it is "safe" for passengers.
However you can sometimes enter directly from Smallbrook Queensway, usually either first thing in the morning before the security staff have turned up, or last thing at night after they have gone home for the day, or if you are railway staff and happen to be mates with the jobsworth guarding the entrance.
Funny how the big bad killer virus doesn't seem to active early in the morning or late at night and it is "safe" to enter the station using all entrances. Perhaps someone should tell the government about this.
Presumably rail staff have some natural herd immunity which means that it is "safe" for them to enter via Smallbrook Queensway at all times. I saw this happen, and yet when I tried to enter the station by the same door the jobsworth made me go all the way round to the other side.