Take the coin out of the packaging without touching it.
Locate 1 of the identifying points on the poppy as shown in the image.
Peel the sticker and lower the identifying point onto the exact same point on the coin – hold the identifying point in place with your nail or tweezers whilst releasing the remainder of the sticker to line up with all other edges of the poppy – do not press it down yet.
If the poppy is not quite lined up – it should be possible to move it carefully with your nail or tweezers.
Once you are happy with the position – wearing a glove or with a clean cotton cloth press hard with your thumb on the middle of the poppy – perhaps gently twist your thumb to ensure the sticker is bedded in and shows the contours of the poppy petals from the coin.