Can anyone identify these bird droppings please?

Slightly odd request perhaps but I was wondering if anyone might be able to help me identify our mystery visitor?

We have a special wildlife area in our garden, but we also have just a small feeder on our patio. Every so often we wake up to find this on our patio. 

Whatever it is is most welcome but we’re curious to know what it is! Can anyone help? I’m guessing it’s 1cm in circumference and over two inches long?

For context, we live in a village on a small estate so our garden isn’t accessible really by any land critters (we think).

Thanks for any help you can offer!