After asking this question I found a solution.
However after applying the commands which effectively removed snap-store I then get a message indicating an application update to core 16 the snapd runtime environment.
On selecting Update All a message appears Unable to Install Updates: snap has no updates available.
snap install snap-store has made no effect.
What must I do to correct this problem, clear the Update flag and ensure that any installed snaps are automatically updated?

snap refresh core, it should give the same result. – mook765 Mar 04 '21 at 15:59killall gnome-softwaremay solve problem if it's a problem in gnome software or snap store. – MandiYang Mar 04 '21 at 18:33