Slice the cucumber into 1/2-inch thick rounds and set aside.
In a medium bowl, combine the softened cream cheese, chopped smoked salmon, fresh dill, lemon juice, and Worcestershire sauce. Mix until smooth and well combined.
Season with salt and pepper to taste.
Using a piping bag or a zip-top bag with the corner snipped off, pipe the smoked salmon mousse onto each cucumber round.
Garnish with a small sprig of fresh dill on top.
Arrange the canapés on a serving platter.
Chill the canapés in the refrigerator for at least 30 minutes before serving to allow the flavors to meld.