By Racinguk.com staff
The six-year-old mare won a Listed prize at Prestbury Park in the spring and although she suffered a short-priced defeat on her final outing of the campaign at Newton Abbot in May, she was an even-money shot to make a successful reappearance.
Aidan Coleman's mount disputed the running with Treackle Tart for much of the two-mile-five-furlong journey before striking on after jumping the second flight from the finish.
Treackle Tart dug deep in an effort to claw back the deficit, but Brillare Momento was not for catching on the run-in and passed the post a length and a half to the good.
Keighley said: "I probably shouldn't have run her at Newton Abbot. It was probably one run too many and the track was too sharp.
"She loves it round here and she was probably a bit rusty. She was close to a few and she will come on for that run.
"Aidan Coleman was delighted with her. She has got a massive future and could keep on improving.
"We would be looking at the David Nicholson (OLBG Mares' Hurdle) in March if she is going the right way.
"She needs to keep progressing, but there is a good programme for these mares and we will probably keep her in Listed-class mares' hurdles."