Barlow announced in January 2011 that he was to hold a solo concert entitled GB40 at the Shepherd 's Bush Empire to celebrate his 40th birthday and his 20 years in the music industry with all money going to the Prince 's Trust charity . Barlow was joined by guest appearances from Chris Martin , Ellie Goulding , Midge Ure and his bandmates from Take That , while also receiving recorded birthday messages from a number of celebrities such as Chris Moyles , Peter Kay , Elton John and Robbie Williams
GB40
GB40
Gary Barlow