A dozen horses, headed by Commonwealth Cup winner Advertise, are set to run in Saturday’s Group One Darley July Cup at Newmarket.

Martyn Meade’s three-year-old – a winner over course and distance in last year’s July Stakes, will be partnered by the very much in-form Frankie Dettori.

Another winner coming from Royal Ascot is Roger Varian’s Cape Byron, who could be improving and has made his mark in major handicaps this season, landing Ascot’s Victoria Cup before following up in the Wokingham.

“I thought he would nearly win the Victoria Cup and he did,” said Varian.

“If you watch that race, he tanks through the first two furlongs and thank God the field merged as he has no cover and he was almost doing too much. They couldn’t go quick enough for him and when the field merged he dropped his head and he quickened best of all.

“He won the Victoria Cup well, but he was hanging on at the end. You almost watch it wishing it was a six-and-a-half-furlong race.

“Mick Denaro, who rides him, mentioned that he thought the horse would go well over six furlongs. With his input and the way the Victoria Cup unfolded, he looked like a horse that would be just as comfortable if not more comfortable back down a furlong where the field was going quicker – and he proved that in the Wokingham.”

Sir Michael Stoute’s Dream Of Dreams – agonisingly beaten by Blue Point in the Diamond Jubilee Stakes, takes his chance.

Former winner Limato and last year’s runner-up Brando, return for another crack.

Brando’s trainer Kevin Ryan also runs Major Jumbo, while Aidan O’Brien fields three in an attempt to keep hold of the prize he won last year with US Navy Flag.

Ten Sovereigns was unbeaten at two, winning the Group One Middle Park Stakes over six furlongs. However, his three year-old career has yet to catch fire after defeats in the 2,000 Guineas and Commonwealth Cup.

Ballydoyle are also represented by the filly Fairyland – who ran on to be fifth in the King’s Stand at Ascot – and So Perfect.

Michael Bell’s Pretty Pollyanna made a big impression when winning the Duchess of Cambridge Stakes over course and distance a year ago.

She drops in trip after running over a mile in the Irish 1,000 Guineas and then disappointing in the Coronation Stakes.

Charlie Appleby runs Glorious Journey, narrowly beaten by Limato over seven furlongs, in the Criterion Stakes.

Lim’s Cruiser, eighth in the Diamond Jubilee, represents Singapore.