A petition to save services at the Children's Heart Unit in Leicester's Glenfield Hospital will be handed in to Downing Street later today.
130,000 people either signed the online government petition, or put their names on a paper copy.
The petition will be handed to Leicester West MP Liz Kendall later this morning..
The Eat Midlands Congenital Heart Centre Project Manager will present the petition, alongside one of the matrons at the children's heart unit at Glenfield and a woman whose son has used the centre.
Regarding the issue of services at Glenfield, an NHS England spokesperson said: