Blackbird Festival 2026 - Cardiff Castle

Alter Bridge Claims the Castle: Rock icons and Welsh heroes unite to lay siege at the stunning debut of Cardiff's Blackbird Festival

Cardiff Castle has played host to some historic moments (quite literally!), but the inaugural Blackbird Festival might just go down as one of its most triumphant. As part of a massive summer of music in the Welsh capital, this one day event was curated in collaboration with American alt-rock titans Alter Bridge. ​Following a week of record breaking heat, the cloudy morning thankfully gave way to bursts of brilliant sunshine just as Planet Rock’s Ian Danter took the stage to compere the event. Right from the go, Danter dropped heavy hints that this wouldn't be a one-off and based on the day that followed, that’s exactly what the Cardiff crowd wanted to hear.

​Kicking off a stellar trio of Welsh acts on the bill were Cardiff’s own Cardinal Black. Having recently wrapped up a European tour with Alter Bridge, the blues-rock outfit looked and sounded entirely comfortable on a stage of this scale. While the entire band was locked in and remarkably tight, the spotlight naturally fell on the soaring soulful vocals of Tom Hollister and the truly exceptional guitar work of Chris Buck. The tone and sheer feel on display during the solo of "Tell Me How It Feels" was a masterclass and one of the highlights of my day. Delivering a classy and controlled five song set, they had the early crowd singing along and effortlessly eased everyone into the day.

​The Welsh theme continued in heavy fashion as Merthyr Tydfil’s Florence Black took to the stage. As their countdown intro faded, they launched into "Look Up" with thundering drums, massive stomping riffs and a swagger you couldn't help but feel. For a three-piece, they produce an astonishingly massive sound, anchored by heavy grooves and anthemic choruses. While each song brought its own distinct vibe, the band’s identity remained fiercely consistent throughout. They also tore through a lively and honest cover of "Breadfan" by Welsh proto-metal legends Budgie in a nod to their Welsh roots. Closing out with "Sun & Moon" they made a theatrical exit to the PA blasting Tom Jones’ Green, Green Grass of Home, a perfectly cheeky end to a ferocious set.

​Crossing the Atlantic, Mammoth brought a dose of pristine American rock into the afternoon. Opening with "The End", front-man Wolfgang Van Halen immediately locked into a complex tapping guitar riff. While it’s a technique pioneered by his legendary father, Wolfgang rapidly proved he isn't riding on anyone's coattails and that his own staggering talent speaks for itself. The band possessed all the confidence and immaculate showmanship you’d expect from a top tier US touring act. Yet, despite his pedigree, Wolfgang remains almost too humble, smiling as the Cardiff crowd chanted his name. Seamlessly bouncing between lead vocals, blistering guitar work and playing keys as well, Wolfgang led Mammoth through a vibrant, high-energy set of modern alternative rock that solidified them as a force to be reckoned with.

By the time Newport’s Skindred (another Welsh band based just a few miles down the road) stepped out, the sun was blazing and the castle grounds had transformed into a sea of brightly coloured hats, floating balloons and pure party energy. Skindred operated on a completely different level to all other bands on the bill so far. Frontman Benji Webbe commanded the stage with absolute authority, effortlessly manipulating the crowd through call and response chants and razor sharp comedic banter. Their eccentric blend of reggae-infused nu-metal grooves had the entire audience bouncing on command. By the time they closed with Warning the entire historic setting participated in their traditional "Newport Helicopter", sending shirts, banners and anything else the crowd could get their hands on spinning through the air. On paper, Skindred’s chaotic sound and energy shouldn't work for me but ultimately they stole the show and were my band of the day.

​As the sun began to set behind the castle walls, a fully sold-out crowd welcomed headliners Alter Bridge to the final date of their tour and the maiden voyage of their own festival. The band wasted no time, effortlessly transitioning from one hit to the next with zero fluff or filler. The set spanned their extensive back catalog and was elevated by immersive visuals that reinforced what was happening on stage. Beyond a brief heartwarming pause to sing Happy Birthday to a fan on the barrier, it was a masterclass in polished rock showmanship. Myles Kennedy’s powerful vocals soared over the audience and he traded alternating shredding but still melodic guitar solos with Mark Tremonti. They tentatively wrapped up their main set with the massive "Metallingus" before returning for an encore of "Blackbird" (fittingly echoed by the festival's name) and then ending with a finale of "Isolation".

The inaugural Blackbird Festival was an unwavering success. Seamlessly blending world class talent with the absolute best of Welsh rock, it felt like an instant staple of the UK summer diary. If today was anything to go by, this is an event you cannot afford to miss next year.

Review by: Tom Potter

Photos by: Charis Lydia Bagioki

this is an event you cannot afford to miss next year.