The two limited edition prints donated by the enigmatic, Bristol-born artist raised over £140,000 for the Temwa and Aid Box Communities charities.
The band collaborated with the Tyndall Center for Climate Change Research.
Praised for its diversity and impact, 90s dance music is to electronica fans what the 60s were to classic rock aficionados.
Del Naja's original 'Help95' print has been reworked by the artist for a unique fire-sale, and is on sale from today, June 24.
Launching tomorrow (June 17), the collection will feature football jerseys, button-downs and shorts.
With partner Daevid Allen, Smith formed the first incarnation of Gong in 1967.
Also on the bill for next year's event are Nick Cave & The Bad Seeds, Slowthai, Massive Attack, Yeah Yeah Yeahs and many more.
The Bristol collective hit the UK summit for the first time with the 1998 album.
IDLES, Tricky and Cocteau Twins’ Liz Fraser have also pledged support to ‘Bristol United Guild’.
Their second UK No.1 album was described by one reviewer as "a masterpiece of haunted sonics."
Emerging from Bristol in the late 80s, Massive Attack combined genres into something sleek, modern, and classic. These are some of their best.
‘As a touring band, we’ve always been aware of the damage our industry and its behavior does to the environment.’
“This would be the next generation’s rock’n’roll, but what would be its soundtrack?” says ‘Hackers’ director Iain Softley.
The British duo comprised of 3D and Daddy G and pioneered Bristol's trip-hop sound with classic albums like Mezzanine and Blue Lines.
Both versions are full of bonus material, while the soundtrack debuts on vinyl for Record Store Day.