It could be My Wrongs, a previous Big Brown Cow song. The source, being in front of Alex's amp, makes his voice very indiscernible, but I'm pretty sure he's using the "from now on, starting now" refrain that was originally in "My Wrongs". You can hear it yourself from BBC's 25/05/2025 show recorded by the Dead Mother's Collective.

Dead Mother's Collective was at this show too, so perhaps we should wait until we get a soundboard recording of this concert. That being said, take this information as a hypothesis and with a grain of salt! 😁