Catfish And The Bottlemen debut new song 'Fluctuate' live.

Catfish And The Bottlemen headlined This Is Tomorrow festival in Newcastle Upon Tyne last night, debuting a brand new song which is believed to be titled 'Fluctuate' during their set.

Watch fan-filmed videos of the new song below...

P.S. Read our latest CATB interview here.

wow that video didn’t do it justice this is PART 2 of catfish and the bottlemen new song pic.twitter.com/r3PGucRDMT

— MLE @ CATB (@notemilycoates) May 25, 2018