Just 24 hours after his scintillating victory in the Vodafone Derby at Epsom, Frankie Dettori bagged a Classic double when making all on Lawman to land the French equivalent, the Prix du Jockey-Club, at Chantilly.

Dettori had arrived at the Paris venue in relaxed mood after steering Authorized around the famous Surrey Downs to capture the blue riband for the first time at the 15th attempt.

And he oozed confidence on Jean-Marie Beguigne's charge as punters on both sides of the English Channel steamed into his mount and sent him off the 4-1 joint-favourite.

Although the race was delayed by a false start, once it got going for real his legions of supporters were always involved in the action, with Dettori setting out to dictate matters from the front.

The Italian - only riding the winner as regular rider Olivier Peslier was claimed for No Dream - kicked again turning for home and wound things up down the straight for a comprehensive length-and-a-half success.

Literato flew from out of the pack but was always playing second fiddle, with British raiders Raincoat, Halicarnassus, Medicine Path and Sunshine Kid all failing to cut any ice in company with Aidan O'Brien's Chinese Whisper and Alexander Of Hales.

Dettori's victory may have been his third in the race following the successes of Polytain in 1992 and Shamardal two years ago, but it rates by far his most significant.

He said: ''I am going to have some headache tomorrow morning. Winning on Saturday gave me more confidence today without a doubt.

''It was very hard for me to judge the race as I didn't really know the horse, but Olivier and the trainer gave me great confidence. I thought if I can get a breather in round the turn and then drop the hammer down the straight, I will be very hard to catch.

''It was always my plan to lead and the trainer had told me to ride him how I wanted.

''I knew if he ran like he felt I would be OK and I knew when I kicked that it was over.

''I don't feel a thing any more, and I don't know what to think - I don't even know what is going on! This is just so surreal and crazy. People wait all their lives to win a Derby and I win two in 24 hours.''

Dettori, who went through the card with seven winners at Ascot in 1996, plans to return to the saddle at a low-key meeting today.

He added: ''The Magnificent Seven was unique, but these are major races, and I am sure I will have a headache at Windsor tomorrow night!''

There were tense moments after his trademark flying dismount, however, when he was whisked off to the stewards' room to face an inquiry.

Dettori explained: ''I fell off during the parade and then got back on, but I could feel he was uncomfortable so I broke off from the parade.

''The stewards asked me why I had broken the parade so I told them. I got off after the false start too as the others left me and the horse wasn't keen to go back to the start.''

Dettori had a night on the town to celebrate with Authorized's trainer Peter Chapple-Hyam after his Epsom heroics, but was planning to be slightly more reserved in the wake of this success.

After Saturday's Epsom joy, Dettori set his sights on repaying the goodwill gesture of his regular employer Sheikh Mohammed after claiming his first Derby victory at the 15th attempt.

Dettori was granted permission to partner hot favourite Authorized, trained by Peter Chapple-Hyam, at Epsom because Mohammed did not have a leading runner in the race.

After roaring home by five clear lengths in the Vodafone-sponsored classic, Dettori said: ''Sheikh Mohammed let me off to ride Authorized because we didn't have a runner in the race this year.

''But I'd love to win it for him because he gave me the go-ahead to get on this horse. My biggest ambition is to try to win it for Sheikh Mohammed.''

Three-times Derby winner Pat Eddery was full of praise for Dettori.

Having landed the famous race on Grundy back in 1975, Eddery went on to win it twice more aboard Golden Fleece and Quest For Fame, and believes Dettori can go on and repay Mohammed.

''It was excellent to see Frankie win it and I suppose he was obviously going to do it one day,'' he said. "It was just a matter of time I think and he'll probably carry on from there - it normally happens that way once you've broken the ice.''