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:
"It is our intention that public consultation on our proposals for congenital heart disease services is as accessible and wide-ranging as possible. This is a national consultation, starting in the New Year (exact dates tbc), and will include a number of opportunities for people to meet with us, right across the country." "We are planning a number of meetings in the Leicester, Leicestershire and Rutland areas, as well as attendance at Health Overview and Scrutiny Committees and Health and Wellbeing Boards. The final details regarding dates, venues and event registration will be available at the time of consultation launch. As well as face-to-face meetings, we will be holding a number of webinars, and using social media to engage with as many people as possible."