There was no way for the two uranium mines to get ore out of the country without having it inspected. He was sent by members of Cheney's team and delivered his report to them when he returned from Africa.
The forged document in question was signed by a person in authority that had been out of office for ten years. The question has never been answered as to who made up the forgery but it was supposed to be gotten from Israeli intelligence.
This was in the British newspapers. Bush and Blair pushed the envelope as far as possible to justify the attack on Iraq. I suppose they were hopeful that weapons would be found.
The whole thing smells of intelligence and counter-intelligence with the leaders of two countries picking and choosing the bits of intelligence that suited their purpose.