A Vodafone Derby spokeswoman said: "It was all very amusing, really.

The Queen Mother and Duke of Kent took a close interest (in the Derby)

"It was just after the horses had finished that these men came over from the Club Enclosure.

"We're not quite sure how they managed to do it because the fence is very high, but they did.

"Then they ran along and one of them pretended to fall over as he crossed the line.

"They must have been out there for about two minutes before the crowd control men came and picked them up.

"The crowd were still cheering from the race and they kept going for these two guys."

A Surrey police spokeswoman said two men had been arrested for streaking at Epsom.

"They are currently being held in custody at Reigate police station," she added.