Trainer Richard Fahey will be a happy chappy when he goes to bed tonight.

His horse, Ribchester, powered home to take the Queen Anne Stakes, the first race of the day.

"It was a good race to watch", the Irishman told BBC Radio Berkshire. "I always felt comfortable watching him".

"We've got another ten or 12 runners, Ribchester was the big one for us, but we do have a few little squeaks during the week too".

15:40 result

1 Lady Aurelia 7-2

2 Profitable 14-1

3 Marsha 11-4 Fav

17 ran

Also: 16-1 Muthmir 4th

Lady Aurelia will have to do without the company of jockey Frankie Dettori in the King's Stand Stakes (15:40 BST).

Injured Dettori misses the meeting and will be replaced on last year's Queen Mary Stakes winner by John Valezquez.

You can check out the full line-up on the BBC Sport website.

Image source, Getty Images

Adam Whitty
BBC South

Royal Ascot 2016 was a special one for trainer Clive Cox.

His horse Profitable took the King’s Stand Stakes on the opening day and then 24 hours later My Dream Boat came home in the Prince Of Wales’s Stakes.

A special 48 hours, underlining his incredible 42% strike-rate in the royal meeting’s Group Ones since 2010.

Image source, PA

Profitable will hope to defend his King's Stand Stakes title today, while My Dream Boat could pick up another victory on Saturday.

But the Berkshire-based trainer isn't relying on his big guns.

"We've got some nice ones coming along behind as well, among those would be Harry Angel and 'Tis Marvellous.

"We've got 100 horses here on the go, so I hope there's a few more stars among them".

Two races, two course records. The quick going saw Rajasinghe break the course record for two-year-olds in the Coventry Stakes.

Jockey Stevie Donohoe, riding for trainer Richard Spencer, got the best of a photo finish from runner-up Headway.

Image source, Reuters

15:05 result

1 Rajasinghe 11-1

2 Headway 33-1

3 Murillo 8-1

18 ran

Also: 4-1 Fav Brother Bear 4th

The ground conditions have changed at Ascot - with the going now described as Good to Firm (from Good to Firm, Good in places earlier).

In other words, it is very fast, as judged by Ribchester breaking the course record in the first race.

We have our first winner of the week, in the Queen Anne Stakes, and it's Ribchester.

In a course record time, too.

After a stellar year in jump racing, Irish trainer Jessica Harrington looks to make a mark at the big flat racing meeting.

Harrington won the Cheltenham Gold Cup with Sizing John and followed up with Our Duke in the Irish Grand National.

She saddles Brother Bear, who comes into the race on the back of wins at Leopardstown and the Curragh, in the Coventry Stakes for two-year-olds (15:05 BST).

You can check out the racecard on the BBC Sport website.

Image source, Getty Images

Image source, Press Association

The pale palette of dresses chosen by the Royal Family for the opening day of Royal Ascot made a delicate background to the Queen's choice of vibrant green.

The Duchess of Cambridge chose a white dress with lace flowers for her second Royal Ascot.

Image source, Getty Images

The high necked dress was teamed with a small veiled hat with floral detail, and hair swept up to reveal pearl earrings.

Princess Beatrice also chose a pale cream dress, embellished with pink jewelled patterns and a pink floral hat.

The Duchess of Cornwall wore a dramatic pearl choker with a hat adorned with large feathers.

Image source, Getty Images

Image source, AFP

Image source, Getty Images

Favourite Ribchester, ridden by William Buick for trainer Richard Fahey, gave owners Godolphin the opening win of the 2017 Royal Ascot meeting.

The 11-10 chance won the Queen Anne Stakes in a course record for the straight mile - 40 years to the day since Godolphin chief Sheikh Mohammed celebrated his first winner as an owner.

It brought a much-needed lift for his team, which saw chief executive John Ferguson step down recently after a deterioration in relations with trainer Saeed bin Suroor.

Michelle Payne, the only female jockey to win the Melbourne Cup, was fifth of the 16 runners on 66-1 outsider Kaspersky as the rider made her Ascot debut.

14:30 result

1 Ribchester 11-10 fav

2 Mutakayyef 5-1

3 Deauville 12-1

16 ran

Also: 50-1 Spectre 4th

Alex Regan
BBC News Online

Royal Ascot has returned with a vengeance and with it punters are suffering in the 30C+ heat. But the gents in the Royal Enclosure aren't the only people to get hot under their over-starched collars.

Radio 4's Today Programme has once again offered its predictions for the perennial race meet. But after appalling form in predicting winners in 2016 - with only one winner - they're slowly becoming known as the Sunderland AFC of racing tips.

If you fancy losing some money, here's Radio 4's racing tips for the day:

• 3:40 King's Stand Stakes - Marsha
• 5:35 Windsor Castle Stakes - Elizabeth Bennett

Ribchester, the mount of William Buick for trainer Richard Fahey, is set to go off favourite for the opening Queen Anne Stakes (14:30 BST).

The Lockinge Stakes winner runs in the royal blue colours of Sheikh Mohammed's Godolphin team, who also have Dutch Connection and Toscanini in the race.

Australian Michelle Payne, the only female jockey to have won the Melbourne Cup, makes her Ascot debut on outsider Kaspersky.

You can check out the full racecard here.

Image source, Getty Images

The Queen has led a minute's silence at Ascot in light of the recent terror attacks and the Grenfell Tower fire.

Image source, ITV

Adam Whitty
BBC South

Ladies and gentlemen, it's a green hat, a green hat everybody.

It looks like a lime one to my eye.

The Royal Procession is a wonderful thing, as Her Majesty and the carriages make their way down the course, and now into the Parade Ring.

Image source, Reuters / Matthew Childs Livepic

The Royal Procession is making its way down the racecourse now.

The Royals have been arriving this way since King George IV introduced the idea in 1825.

Image source, ITV

This is who is in the carriages today:

Carriage one: The Queen, The Duke of Edinburgh, The Duke of York and The Lord Vestey.

Carriage two: The Prince of Wales, The Duchess of Cornwall, Princess Beatrice of York and Princess Eugenie of York.

Carriage three: The Duke and Duchess of Cambridge and The Earl and Countess of Wessex.

Carriage four: Mr and Mrs Peter Phillips, Lord and Lady Fellowes.

Following the arrival of Her Majesty The Queen and the Royal Party in the Parade Ring, a minute’s silence will be observed across the racecourse.

Michelle Payne, the only female jockey to have won the Melbourne Cup, makes her Ascot debut in the opening Queen Anne Stakes (14:30 BST).

Payne is on board outsider Kapersky for trainer Jane Chapple-Hyam.

"It's been crazy since I won the Melbourne Cup, and I can hardly believe I'm about to take part at such a prestigious event," said the 31-year-old rider.

"The horse is in fantastic order, he's a quality galloper and if he's in good shape, you never know."

Image source, Getty Images

Adam Whitty
BBC South

Describe Britain to a foreigner.

Well, we have statistics, predictions and odds all based on what colour hat a 91-year-old will wear.

We are expecting Her Majesty to make an appearance at about 14:00 BST.