It's what TM has already said that she'll back if she is re-elected.
It's a plan to force the NHS Trusts to sell their assets, primarily land, to provide capital funding for their own services. If NHS hospitals don't want to do this, they won't receive capital funding from the Treasury.
The private company company NHS Property Services has been established to broker deals.
Obviously, one piece of land can only be sold once. Once the money raised by flogging land has been spent on MRI scanners etc, there are no plans for the Treasury to resume capital funding.
If you don't mind the NHS being sold off to private companies and moving towards a US style of health care then, fine, vote for the Tories.
If you do, just don't vote for this.