The only fair way to raise the required funds is from income, each according to their means. The easiest way to raise it would be by diverting a set percentage of income tax, as the mechanism for collection is already in place.
Of course the raving socialists would want to place a tax on capital as well:- the typical politics of envy.
The system in place at the moment of taxing a properties worth is heavily skewed to shaft those at the bottom. Typically the lowest band payment is about 1/3 of the highest, spread among 8 bands. House prices range from 100k£ to millions. This system is as unfair as the poll tax but did not generate as much resistance when introduced.
To put that in perspective the 8 bands range roughly 1k-3.5k£ p.a.
Av income, depending on sources, is 26/27k£ before deductions.