Not under current rules, but if your adult children live with you they can.
http://www.ageuk.org.uk/home-and-care/care-homes/the-means-test-and-your-property/
It's also worth noting that current rules for care in the home also has a £23k limit, but this excludes property.
Neither scenario has a cap on the maximum that can be paid.
The proposed changes, when looked out outside the lies and misinformation spread by some ( similar to tuition fees) the new solution is better than the old, allowing greater retention of wealth via inheritance and less burden on the state.