Grand National-bound horses held sway at Navan on an afternoon of surprises in the big races.

The Willie Mullins-trained On His Own (10-1), carrying the colours of Graham Wylie, galloped to favouritism for the world's most famous steeplechase when taking the Ladbrokes Boyne Hurdle.

The nine-year-old joined Si C'Etait Vrai in front at the third-last under Paul Townend and stayed on best to win by two and a quarter lengths, with odds-on stablemate Thousand Stars last.

Gordon Elliott's outsider of four Chicago Grey sprung the biggest shock when landing the Red Mills Chase at odds of 25-1 as he built towards Aintree.

The 10-year-old was always travelling sweetly for Davy Condon and after favourite Rubi Light folded tamely, Chicago Grey eased past Foildubh on the run to the final fence and scored by two and a half lengths.

Five turned out for the Flyingbolt Novice Chase and they provided an exciting finish as Henry de Bromhead's Buckers Bridge (7-2) returned to winning form.

Beaten for the only time behind Arvika Ligeonniere last time, the seven-year-old put that right as he rallied on the run-in to grab Twinlight and score by a head under Andrew Lynch.

There was another victory for the Mullins yard when Terminal took the Irish Form Book Ten Up Novice Chase in the hands of Ruby Walsh after a duel with the odds-on Tofino Bay

The winning six-year-old (15-8) tracked He's A Delight for much of the way as the jockeys looked for the best ground, and challenged two out before being driven clear to win by five and a half lengths.

There was an upset in the two-mile maiden hurdle when Harry Rogers' Irish Thistle (9-2) dismissed the odds-on City Slicker while the two-and-a-half-mile maiden hurdle was won cosily by Noel Meade's 7-4 favourite Mullaghanoe River completing a Condon double.

Mullins made it a treble when his son Patrick drove up Made In Germany (9-10 favourite) to snatch the Dunsany INH Flat Race close home.