Spread a thin layer of the cream cheese mixture onto each slice of bread, covering the entire surface but leaving a little gap around the edges.
Place cucumber on the bottom bread slice, overlapping slightly, and place other bread slice on top.
Slice off the crust and discard them. Slice the sandwiches at an angle, making 4 pieces, or in thirds, making 3 pieces, or simply cut in half and half again.
Serve immediately otherwise cover with plastic wrap and transfer to the fridge until needed.