Warren Greatrex© Photo Healy Racing
La Bague Au Roi (8-11 favourite) took her winning run to four with an impressive victory in the Ascot mud in the olbg.com Mares' Hurdle.
Warren Greatrex's exciting seven-year-old took the lead four out when the pacesetting Midnight Tune started to weaken and was not extended as she won in style under Noel Fehily.
A superb leap at the last in the Grade Two over an attritional two miles, seven and a half furlongs helped her prevail by 16 lengths from Sainte Ladylime.
Fehily said: "She was brilliant the whole way. I'd never sat on her before and I spoke to Richard Johnson and my job was pretty easy.
"Aidan (Coleman) went a nice a gallop but I was hoping he'd take me further than he did. She jumps well so I let her get on with it. She's a real galloper. She's a good mare."
Greatrex said: "It is just lovely to see her fulfilling what I've always thought. She has always been that size since a four-year-old. She has just been weak.
"She has become much more professional and she jumps fantastic. Noel said the ground was plenty soft enough for her and she will be better on better ground. She is high-class.
"She is in the mares' race and Noel said you could drop her down as she is not slow. The Stayers' Hurdle is tempting because on better ground with a 7lb allowance, she is in the mix. We will see.
"She is just a relentless galloper with a huge stride and I think she is now the finished article, so I think you can do whatever really.
"She is a very geniune mare that tries very hard. To win a Grade Two as she has done on ground she doesn't like, she has destroyed them.
"He wanted to get a lead for longer, but they couldn't go with her. I still think there is more in the tank. On better ground, I think there are some huge performances in there. We will wrap her up for Cheltenham now."
Betfair cut La Bague Au Roi to 14-1 from 20-1 for the Mares' Hurdle and to 25-1 from 40-1 for the Stayers' Hurdle at the Cheltenham Festival.
