The two-year-old filly has been in full training with Andrew Balding for seven months and is now set to take on a seven furlong race.
Balding reports that On Demand has progressed nicely at his Park House Stables in Kingsclere and is now being fine tuned for her first outing.
"Barring any last minute hiccups I think she's pretty much ready to go," he said. "It's just a case of dotting the 'i's and crossing the 't's before next week.
"I've been very happy with her. She's done everything as you'd expect and I'm sure she'll improve with the experience of a run.
"She's certainly ready for her debut and I hope, as long as the ground isn't too fast, she'll run a nice race.
"She's done a lot of growing and developed a little bit of strength in the last six weeks which has enabled us to go to the next stage of getting her onto the racecourse next week."
Sky Sports News teamed up with Great British Racing to buy On Demand in a bid to show viewers - who have since voted for her name and colours - what it takes to develop a race horse.
And to celebrate her debut we are giving you the chance to be On Demand's owner for the day at Lingfield. Enter the competition here. It runs until August 29.