Horfinch - any birds who sound similar?

Hi,

I'm just learning about birds, and like to use the Merlin app to identify birdsong in our garden. Usually it picks up common birds which I can easily spot, but two days in a row it thinks it heard a Horfinch.

I know they are pretty rare, and Merlin can make mistakes so I never blindly believe it - but seeing as it picked it two days in a row I want to get to the bottom of it! I wonder if there is another bird with a similar call that Merlin has mixed up? How unlikely is it to actually be a Horfinch?

I've not had any sightings, but I understand they are shy and can be difficult to spot despite their size and appearance.

More info: We live in rural Shropshire on the Welsh borders, and have a lot of birds visit our garden - we love to feed them & try to keep the garden as wild as possible.

Merlin picked up the Horfinch call at around half 9 in the morning on both days, just as I headed out to top up the feeders.

Many thanks!