Axl Rose and his latest backing band will now be playing the 02 Arena on June 1 after the date on May 31 sold out.
Thin Lizzy have also been confirmed as their support act.
Guns N" Roses are spending this summer of the European festival circuit - including playing Costa De Fuego Festival in July, a new festival by the organisers of Benicassim on the same Spanish site.
Meanwhile Slash has confirmed the original line-up will not be performing together at their induction into the Rock n Roll Hall of Fame.
The original members will all be in the same room to recieve the honour - which had sparked hopes of a full scale reunion.