Is this a Siskin?

Is this a Siskin?

Observation - Is this a Siskin? - UK and Ireland. Description: Saw a group of these on a feeder at Fairholmes beside Ladybower Reservoir in Derbyshire. I have never (knowingly) seen a Siskin, and have tentatively identified it from a reference book, but it does not exactly match the illustration.

Saw a group of these on a feeder at Fairholmes beside Ladybower Reservoir in Derbyshire. I have never (knowingly) seen a Siskin, and have tentatively identified it from a reference book, but it does not exactly match the illustration.