Beko vented tumble dryer (Northfield B31)

This is a 6kg Beko tumble dryer. It has sensor drying. Though it does work, there is a coin or something similar that has fallen behind the drum and I don’t know how to remove it, as you can’t use the tumble dryer while the coin is behind as it will damage it. So if you know how to remove the coin, you will have a lovely workable dryer. It is about 15 years old, the last time I used it was about 6 weeks ago, it drys fast and beeps when clothes are dry. You will need a vent hose. It does not cost a lot to run either.