Games boss Sebation Coe warned anyone wearing a Pepsi T-shirt is likely to be booted out because it would upset sponsors Coca-Cola.

And he only said spectators in Nike trainers “could probably” be allowed in although Adidas are also backing the event.

Coe defended the draconian move and said it was to protect corporate sponsors who have paid a fortune to be involved.

It’s the latest example of a ruthless brand crackdown in the run-up to the London games.