With two weeks to go before the secret ballots for 2018 and 2022, Bin Hammam said the time had come to return to the more routine process of voting for one tournament at a time, and thereby reduce the possibility of corruption allegations that have plunged the process into crisis.

"I hope it's the last time," Bin Hammam, a FIFA executive committee member, told the Aspire4Sport conference in Doha.

"From the beginning the Asian members, including me, were not convinced that deciding two World Cups at the same time was a good idea.

"I raised my voice and said the decision for 2022 should perhaps have been in 2016, or maybe 2014, and that it was not appropriate for people sitting in the FIFA exco [executive committee] today to make that decision.

"We raised so many objections but the vote was taken and we were outvoted. I hope people have realised that it was wrong."

FIFA's ethics committee are due to rule tomorrow on Qatar's alleged collusion with Spain, along with whether to extend the suspensions of two FIFA executive committee members over reported claims of corruption. All parties protest their innocence.

Bin Hammam, one of FIFA's most prominent voting members, said: "I trust the committee and I'm sure they will come to the right decision to protect the integrity of the game.

"From where I am sitting, I would like someone to tell me what the collusion is. It may be nice to say something is happening between Qatar and another bidder but please tell me exactly what it is?"

He repeated that eliminating joint ballots would reduce any possible misinterpretation of approach, adding: "Once this is in place, two people will no longer be able to talk about supporting each other. A lack of specific criteria needs to be addressed."

Qatar's searing summer heat was one of the factors highlighted in FIFA's evaluation report as a potential health risk but Bin Hammam pointed out Qatar's planned revolutionary cooling techniques.

He said: "The temperature inside the stadiums in July and August will be 25-26 degrees which is actually a perfect climate to play football. In some other countries people complain about the cold. In South Africa we had one of the best World Cups but the temperature was zero which was not ideal."

Bin Hammam declined to comment over whether the spate of corruption allegations emanating from the British media will ultimately work against the English bid for 2018.

"I respect the English media but sometimes they go over the top," he said.

"If there are conditions put in place for voting for someone, that is wrong and people should not deserve to be where they are. But that didn't happen."