Michael Bell's Big Orange made all the running for the second successive year to claim the Princess of Wales's Arqana Racing Club Stakes at Newmarket at 8-1.

Victorious jockey James McDonald, who is one of Godolphin's retained riders in Australia, had shone when coming from off the pace on Antiquarium in the Northumberland Plate but was allowed to set his own fractions on this occasion.

With last year's winning rider Jamie Spencer on the favourite The Grey Gatsby it was somewhat surprising the winner was technically ignored up front this time, and he gradually quickened the pace three furlongs out.

The field had raced in Indian file with The Grey Gatsby looking content at the rear, stepping up in trip, and he smoothly began to make progress.

Once Spencer moved alongside Ryan Moore on Exosphere the pair probably expected Big Orange to come back to them, but the impressive McDonald had saved something and kicked on again to beat The Grey Gatsby by two-and-a-half lengths.

McDonald said: "He was pretty happy out there and he gave me a beautiful ride. He's an absolute gentleman and a pleasure to ride.

"He wasn't the best to begin in the stalls as he's so big, but he was a gentleman on the course and that's where it matters."

Bell said: "I couldn't believe they left him alone in front, especially racing in Indian file as they have much more ground to make up from behind.

"He'll just keep going, we know he gets two miles, he wasn't going to stop.”

Kevin Ryan said of The Grey Gatsby: "Jamie was delighted with him, you can't say he didn't get the trip.

"It was a stop-start race and they didn't really go a gallop, I think the sectional times will prove that.

"Obviously he needs an end-to-end gallop, whether that's over 10 or 12 furlongs.”

Mehmas paid a handsome compliment to his Royal Ascot conqueror Caravaggio when running out a ready winner of the Arqana July Stakes as the 11-4 favourite.

Richard Hannon's colt has been kept busy in the first half of the season and beat all bar Aidan O'Brien's colt in the Coventry Stakes.

Everything appeared to go smoothly for Frankie Dettori, who got a nice tow into the race from Yalta and Barrington and when he pulled him out to challenge the favourite quickened up nicely.

Broken Stones, having just his second run, challenged up the rail, while Intelligence Cross, a stablemate of Caravaggio, made plenty of ground from the rear but Mehmas and Dettori won by half a length.

Ardad, John Gosden's winner of the Windsor Castle, was the big disappointment of the race and finished last.

Dettori said: "He sticks his head down and tries really hard. You are always guaranteed a good run from him.

"I'm pleased because he tries so hard and he deserved the win.

"He's uncomplicated. He knows he's got a kick, so it's down to me to press the button. Once you press it he goes.

"He's very versatile goes on any ground like he proved at Ascot. He goes on soft, it was good to firm today.

"He's a good horse with a sweet nature and I'm sure he'll win plenty of races."

Hannon said: "Frankie gave him a lovely ride and he's probably getting lazy as he's never shown us much at home, he tends to just do enough.

"We can look forward to Goodwood now, I think he deserved a nice win after the Coventry.

"It obviously didn't dishearten him, getting beaten, and he is definitely better on fast ground.

"He's in the Phoenix Stakes so we'll look between that and the Richmond.”

Housesofparliament gave Aidan O'Brien and Ryan Moore the perfect start to the July meeting when scoring at 9-2 in the Bahrain Trophy at Newmarket.

Last seen finishing fourth at Royal Ascot in the King Edward VII Stakes behind Across The Stars, the Galileo colt was well on top at the finish.

With two furlongs to travel nearly all of the nine runners still had a chance and were spread right across the track, but the favourite Prize Money was one of the first beaten.

Mick Channon's Harrison briefly looked like stamping his authority on the field but on meeting the rising ground Housesofparliament really picked up strongly.

He powered a length and a half clear of Michael Stoute's Platitude, with Harrison third.

Moore said: "Aidan's horses all take their racing very well.

"This horse has run on soft ground all year and it's the first time he's had decent ground and he's relished it.

"He saw it out well and the ground has made a difference to him today."