She completed the brace in the Mares’ Bumper with a delightful display on her father’s Carries Darling, who carried the colours of her uncle, Billy.
Oscars Business went to the front rounding the home turn and looked the most likely winner at that stage.
But young Mangan was soon out after the leader and, with impeccable timing, swept Carries Darling past inside the furlong pole to score by a length and a quarter.
“She’s well-bred and could now go to Navan for a mares winners’ bumper”, reported trainer-Mangan.
“I’m delighted to see ye”, quipped Jane earlier on, to the assembled press, after guiding Luke’s Benefit to victory in the Britain V Ireland Ladies’ Challenge Handicap Hurdle.
She got some terrific leaps from the Denis Hogan-trained, front-running grey, who was in complete control all the way up the straight.
It was a first ride over flights for Ms Mangan, who has two successes in bumpers to her credit. She also won three point-to-points, all on Conna Castle.
Jenari, partnered by her brother, Patrick, was always long odds-on in the Martinstown Opportunity Maiden Hurdle, but essentially any price was a good price.
He toyed with the opposition, easing to the front over the second last and quickly stretching clear to beat Tailors Hill by eight lengths.
The Milan gelding was confidently handled by in-form Mangan, having a first ride for trainer, Jessica Harrington.
Golden Sunbird, who took a crashing tumble at the final fence at Thurles previously, showed just how brave she is with a fine display in the Glenview Stud EBF Beginners Chase.
“It is hard to fancy them when they take a fall”, said a delighted James Nolan, brother of winning trainer, Paul.
Michael Doran had the ride and was in no hurry, although having Golden Sunbird tracking the pace throughout.
Doran made his move turning in and Golden Sunbird never flinched, staying on doggedly to hold market-leader, Knockfierna, by three parts of a length.
“It took us a week to get her confidence back and then we schooled her morning and evening”, said Nolan.
“We will go home and make a plan, but all of those good mares’ races are after Christmas. I’m delighted for Michael, he was under pressure, having been blamed a bit for the last day.”
Robert Tyner continued his good run when heavily-backed Whatwillwecallher won the Winter Wonderland Maiden Hurdle.
She carried J P McManus’ colours for the first time and is the first horse Tyner has trained for him.
Whatwillwecallher was travelling strongly heading down to the second last and was upsides Castle Wings when that one toppled at the back of the obstacle.
Robert’s wife, Mary, did the honours and reported: “Today was just a stepping stone and we can now plan from here.”
Adrian Heskin rode his first winner, since returning from a long-term injury, on Kilbane River in the Garryowen Handicap Chase.
Conem looked sure to score heading to the last, but hesitated approaching the fence and Heskin seized the opportunity to drive Kilbane River past on the flat. Trained by Joe Quinn, the ten-year-old was nicely supported in the ring, 7-1 to 4-1.
Alan Crowe drove Pauline Gavin’s The Lady Granuaile to victory in the Newton Abbot Races Handicap Hurdle. The winner was inclined to weave about a bit in the straight, but put her head down where it mattered to beat De Dodger by half a length.