Chris Tarrant has been given six points on his licence and fined £525 after he was caught speeding twice in 21 minutes on the same stretch of road.
Celebrity lawyer Nick Freeman, dubbed Mr Loophole, pleaded guilty on behalf of his client after losing an argument for abuse of process.
The District Judge, sitting at Reading Magistrates' Court, gave Tarrant, who was not in court, three points for each offence and ordered him to pay a fine of £525 plus £1,630 in costs.
The TV presenter was filmed twice by the same camera exceeding the 30mph limit on Broad Lane in Berkshire, on the morning of May 20 last year.
He was caught at 10.30am driving his silver Mercedes Benz CL500 at 47mph, cutting a corner. He was then caught by the same marked van 21 minutes later returning in the other direction at 41mph.
Mr Freeman argued that two summonses for Tarrant to appear in court went missing, meaning he received the third summons 11 weeks after the six-month time limit set out in the Magistrates Act 1980.
But the judge found the delay was not the fault of the prosecution and did not prevent a fair trial.
The court heard that Tarrant was notified in June last year of the possibility of prosecution and was offered a conditional fixed penalty of £60 and three points.
The prosecuting lawyer said there was "no response" so the authorities pressed ahead with a prosecution.
Leaving court, Mr Freeman said there was no comment on behalf of his client.