From a personal point of view (as perhaps are most discussions on raising more tax?), Council Tax must be reformed ASAP.
In my street there are two types of house; Semi-detached, in one Council Tax band, and detached, in the next, higher band. Except one; One detached house is in the next, higher, band again. Why? Because when the homes were valued it had already been extended and was larger. Other homes in the street have since been extended and are larger again, yet pay less Council Tax. And that's before we consider the actual income received by the occupants of these houses. IMHO a local income tax would be fairer.
(It won't come as a surprise that mine is the one house in the higher Council Tax band!)