Football Association chairman Greg Dyke has said for the first time that the governing body will drop its backing for Michel Platini if FIFA's ethics committee finds he behaved improperly.
UEFA president Platini and FIFA president Sepp Blatter have been handed 90-day provisional bans by the committee while investigations take place into a £1.35 million payment to the Frenchman.
The action leaves Platini's hopes of running to succeed Blatter in tatters and Dyke said the FA was waiting for the outcome of the investigation -- and is prepared to drop its support.
Dyke told Press Association Sport: "If the ethics committee reaches a conclusion that Mr Platini has not behaved properly or has behaved dishonestly then of course the FA will not support him.
"That's why we said in our statement that we are awaiting the results of the investigation -- we need to see the evidence.
"I can see why people are saying we should stop supporting him now, but we will follow what the ethics committee decides.
"Platini claims it's a fix, but if they decide he has behaved improperly we will not support him and I'm sure I would have the backing of the FA board on that."
Dyke also backed calls by IOC president Thomas Bach for independent candidates from outside football to be allowed to run for the FIFA presidency and said there was a need for radical reform.
He added: "We have a view of reform that is more radical than most which would certainly involve independent directors and could well involve a president from outside football.
"What we do not need is Mr Blatter Mark II."
He added that if there was any finding of wrongdoing by the investigations into the bids for the 2018 and 2022 World Cups he was convinced there would have to be a re-vote.
"I have no doubt if the evidence comes out that a bid was won by corruption there will have to be a re-vote," said Dyke.
Sports minister Tracey Crouch called for Blatter to resign immediately.
She said: "The only way forward for FIFA is full-scale reform. It has to be much more accountable, transparent and restore the faith of football fans across the world. Blatter has hung on to his position for too long and a new president must drive through widespread change."