Anyone with information about the attempted murder can contact Trident officers on 0208 2177382, or on Twitter @MetCC, or call Crimestoppers anonymously on 0800 555 111.
More than a dozen shots were fired from what police believe to be a semi-automatic weapon.
#8220;The shooting happened over a year ago now but I am hoping that someone will come forward who has information.#8221;
#8220;I am hoping this significant reward will prompt someone to come forward with information that will assist in helping us to identify the suspects for this attempted murder.
His wife found him collapsed on the floor outside the family home in Beatrice Close in Plaistow, Newham, in east London, and called 999 at 11.17pm.
The 32-year-old businessman was left with life-changing injuries: he has trouble walking, suffers from epileptic fits, short-term memory loss and can#8217;t use his right hand properly. He is not expected to make a full recovery.