AINTREE belonged to Colin Tizzard as the Dorset trainer took Ladies' Day by storm with a sensational 4,334-1 treble.

While Pingshou (16-1) and Fox Norton (4-1) claimed two of the four Grade Ones on the card, Ultragold capped the day by causing a 50-1 upset in the Randox Health Topham Handicap Chase over the Grand National fences.

Fox Norton emerged as a possible contender for the King George VI Chase at Kempton on Boxing Day after he took the step up from two miles to two and a half in his stride with a clear-cut success in the JLT Melling Chase.

Robbie Power kicked on over two out and continued to pour on the pressure with a bold leap sealing victory as he won eased-down by six lengths from favourite Sub Lieutenant.

"It took all of two miles last year for him to get into third in the Arkle. He's not very fast at home when you think he would be but I think he'll make up into a King George horse," said Tizzard.

"That's seven Grade Ones this season which is lovely. We had a good time early in the season and then we had to go through a bit of pain, but that's all gone now."

Tizzard, winning owners Alan and Ann Potts and their new retained rider Power had earlier taken the Crabbie's Top Novices' Hurdle with Pingshou.

Opening up a healthy lead down towards the penultimate flight, Pingshou had all his rivals cooked, although Mount Mews emerged from the chasing pack to claim second place, four and a half lengths behind the winner.

Ultragold bounced back to form after a few poor efforts when enjoying the National fences to land the Topham under Harry Cobden.

Although Irish raider Katnap threw down a late challenge in the closing strides, Ultragold was not for passing with a length splitting the pair and a further six lengths back to Portrait King in third.