Jonny Buckland most used distortion pedal is the ProCo Rat. Unfortunately, the model he uses is currently discontinued (although the ProCo Rat 2 is available in stores).
According to an essential Jonny Buckland fan site, the Buckland Religion, Jonny has uses the ProCo Rat on, but not limited to, the following songs (the information dates from the X&Y Era):
- Square One
- God Put A Smile On Your Face
- What If
- White Shadows
Jonny Buckland’s full pedal profile